Question

A student had 45 pages to write. By the evening, he had completed 40% of his work. How many pages were left?

Answer 1

27 pages.

Explanation:

100% = 45 pages

1% = 45 / 100 = 0.45

pages left = 100% - 40% = 60%

so, 0.45 × 60 = 27.