Olivia read
18 of the encyclopedia. If she had read another 75 pages, she would have read
47 of the whole encyclopedia altogether. How many pages were there in the encyclopedia?
| |
Read |
Not read |
Total |
| Before |
1x7 =
7 u |
7x7 =
49 u |
8x7 =
56 u |
| Change |
+ 75 |
- 75 |
|
| After |
4x8 =
32 u |
3x8 =
24 u |
7x8 =
56 u |
The total number of pages remains unchanged. Make the total number of pages the same. LCM of 8 and 7 is 56.
Number of additional pages that Olivia would have read
= 32 u - 7 u
= 25 u
25 u = 75
1 u = 75 ÷ 25 = 3
Number of pages in the encyclopedia
= 56 u
= 56 x 3
= 168
Answer(s): 168
