Min had a textbook with 390 pages. She read 50% of the textbook on Wednesday, 20% of the textbook on Thursday and the rest on Friday.
- How many pages did she read on Friday?
- How many more pages did she read on Wednesday than on Friday?
(a)
100% → 390
1% → 390 ÷ 100 = 3.9
Number of pages that Min read on Friday in percent
= 100% - 50% - 20%
= 30%
Number of pages that Min read on Friday
= 30 x 3.9
= 117
(b)
Number of more pages that Min read on Wednesday than on Friday in percent
= 50% - 30%
= 20%
20% → 20 x 3.9 = 78
Number of more pages that Min read on Wednesday than on Friday = 78
Answer(s): (a) 117; (b) 78