Question

Math: There are 30 pages in a chapter of your textbook. You read 40%, how many pages do you have left to read? Explain how to solve this using 2 different methods

Answer 1

12 pages to read left.

Answer 2

Answer:

18 pages left

Way 1: Find what 40% of 30 is and subtracting it from 30, leaving 60% of 30 left:

40% of 30 is 0.4*30 = 12, 30 - 12 = 18

Way 2:  Subtract 40% from 100% and multiply it by 30: 100% - 40% = 1 - 0.4 = .6, 0.6*30 = 18