270×( 1+20%)
=270× 1.2
= 3.24 million yuan
2. During the 11th period, all the books in Xinhua Bookstore were 25% off. Why are 100,000 books 15 yuan? How much are 20 100,000 books?
15×20×85%
=300×85%
=255 yuan
3. To build a 2500-meter-long road, Team A built 40% of the total length and Team B built 36% of the total length.
Question1; How many meters did Team A repair?
2500× 40% =1000m
Question 2; How many meters did Team B repair?
2500×36%=900 meters
Question 3; How many meters did Team A repair more than Team B?
2500×(40%-36%)
=2500×4%
= 100 meter
Question 4; How many meters are left to be repaired? Every question in this problem should be calculated comprehensively.
2500×( 1-40%-36%)
=2500×24%
=600 meters
4. The original price of a book is 80 yuan, with a price increase of 25%. What's the current price?
80×( 1+25%)
=80× 1.25
= 100 yuan
A book has 240 pages, of which 20% has been read. How many pages have you missed?
240×( 1-20%)
=240×80%
= 192 page