[2] Twenty percent of a number is 3/5, and a number is greater than 3/5 [2/5].
[3] Sugar has 10g. After eating 10%, you eat110 kg. How many kilograms are left?
10-10×10%-110 = 89/10 kg.
[4] The number of boys in Class One of Grade Six accounts for 60% of the class. There are fewer girls than boys 10. How many people are there in Class One?
10 ÷ (1-60%-60%) = 50 people
[5] Forty-three percent of decimal units are [1%], and there are [43] such decimal units.
[6] The original price of a hamburger 10 yuan, and the fast food restaurant launched a promotion activity, and the price was reduced by 10%. Later, due to fierce competition, the price of this hamburger was [] yuan.
10× (1-10% )× (1-10%) = 8.1yuan.
[7] If 20% of A is 40 and B is 30% of 40, what percentage of A is B?
A number is 40/20% = 200.
The number b is 40× 30% = 12.
The number b is 12 ÷ 200 = 6% of the number a.
[8] One hundred and fifty percent of a number is more than twice as much as 1/4. What's this number?
(2+ 1/4)÷ 150%= 1.5