1, a suit, coat 840 yuan, pants 2 10 yuan, the price of pants is ()% of the coat, and the price of coat is ()% of this suit.

2. It takes Party A 20 minutes and Party B 16 minutes to get from the school to the Cultural Palace. B's time is less than A's ()%; B is ()% faster than a block.

3. () 60% of the kilometers are 3 kilometers; 20% () tons less than 40 tons.

4. The ratio of A number to B number is 5/2, B number is less than A number ()%, and A number is greater than B number ()%.

5. The sales in May increased by 15% compared with that in April. The sales in May were equivalent to ()% in April, and the sales in April were less than ()% in May.

There is a 20% discount on amusement park tickets during June 1 day, and the current price is ()% of the original price. All school supplies in children's stationery stores are sold at a 10% discount, saving ()%.

7. 1/5=( )%=( )÷40 =4:( )= () (fill in decimal places)

8. Guangming Hotel has a turnover of 400,000 yuan this year 1 month, which is subject to 5% business tax and 7% urban maintenance and construction tax. Then, this hotel needs to pay business tax () yuan and urban maintenance and construction tax () yuan in January.

9. Dad deposited 20,000 yuan in the bank last year 1 month for two years on a regular basis. If the annual interest rate is 2.5%, he has to pay interest tax () yuan at maturity, and he can get back () yuan after one * *.

10. To build a highway, 40% of the total length was built on the first day, and 37.5% on the second day, leaving180m, which is * * * meters long.

Second, judgment.

1, 100g water plus10g salt, accounting for 10% of salt water. ( )

2. Today, 10 1 parts produced in Li Shifu are all qualified, and the qualified rate is10/%. ( )

30% of 3.3 kg is equal to 3% of 30 kg. ( )

4. A dress is sold at 7.5% of the original price at a discount of 25%. ( )

5. If A is less than B by 20%, then B is more than A by 20%. ()

Third, choose

1, a commodity is sold at a 10% discount, indicating that the price is lower than the original price ().

a、90% B、9% C、 1/9 D、 10%

2. The output of rapeseed this year is 1/5 higher than last year, which is ().

A, this year's rapeseed output is 102% of last year's B. Last year's rapeseed output was 20% less than this year's.

C. The rapeseed output this year is 120% D of last year, and the rapeseed output this year is 100.2% of last year.

3. 25% of the male employees are equal to 30% of the female employees, so the number of male employees is compared with that of male employees ()

A, the number of male workers is more than B, the number of female workers is more than C, and the same number D is incomparable.

4. The price of a tape recorder has dropped from 220 yuan to 120 yuan. What is the decrease? The correct formula is ().

a、 120÷220 B 、( 220- 120)÷ 120 C、220÷ 120 D 、( 220- 120)220

5. On April 5th, wang hong deposited 2,000 yuan in the bank with a monthly interest of 0. 12%. How much after-tax interest will he get by June 5? (After-tax interest is 5%) The correct formula is ().

a、2000×0. 12%×( 1-5%) B、2000×0. 12%×2

c、2000×0. 12%×2×( 1-5%)D、2000+2000×0. 12%×2×( 1-5%)

Fourth, solve the equation

40% X+25% X = 130 1/5X+3/7 = 3/7X

Five, only column type, do not calculate the number of steps.

The school library has 350 science and technology books and 400 story books.

(1) What percentage of science and technology books are story books? (2) What percentage of science and technology books are story books?

(3) What is the proportion of science and technology books less than story books? (4) How many story books are there than science books?

Sixth, solve the problem.

1. A canteen 1 1 month burned 50 tons of coal, saving 5 tons compared with the original plan. What percentage was saved?

2. There are 20% more people in the school math group than in the art group. If there are 30 people in the math group, how many are there in the art group? (column equation solution)

Xiaohua will deposit 4000 yuan in the bank for 2 years. If the monthly interest rate is 0.25%, how much interest can he get after maturity? How much can a * * * get back after paying 5% interest tax?

4, a suit ***320 yuan, the unit price of pants is 60% of the unit price of coat, how much is the unit price of coat more than that of pants?

5. In 2005, China announced the new personal income tax collection standard. 1Personal income below 600 yuan is not taxed. If the monthly income exceeds 1600 yuan, tax shall be paid step by step; if it exceeds 500 yuan, personal income tax shall be levied at 5%; Personal income tax will be levied at 10% for the part exceeding 500-2,000 yuan. Xiaoming's mother earns 3500 yuan a month. How much personal income tax does she have to pay every month?

Other issues

1, reduce one side of the square by 20% and increase the other side by 2 meters to get a rectangle. The area of this rectangle is equal to the original square. So what is the area of the original square?

On the National Day, Cong Cong's mother saw the same sweater in two shopping malls, A and B, which is very suitable for Cong Cong to wear. Original price per piece 120 yuan. However, because of the festival, shopping mall A has a 10% discount, while the price of shopping mall B remains unchanged. Mom feels warm now and decides to buy it later. On New Year's Day, I went to two shopping malls, A and B, and saw that the price of this sweater in shopping mall A was 20% higher than that in National Day, while that in shopping mall B was 10%. Mom wants to buy this sweater now. Which shopping mall is cheaper? How much cheaper?