Risa had 119 more stickers than Sarah. After Sarah gave away
25 of her stickers, Risa had four times as many stickers as Sarah. How many stickers did Sarah have at first?
| |
Risa |
Sarah |
Comparing Risa
and Sarah at first |
119 more |
|
| Before |
12 u |
5 u |
| Change |
|
- 2 u |
| After |
|
3 u |
Comparing Risa
and Sarah in the end |
4x3 =
12 u |
1x3 =
3 u |
The number of stickers that Risa had at first and in the end remains unchanged. Make the number of stickers that Risa had the same. LCM of 12 and 4 is 12.
Number of stickers that Risa had more than Sarah at first
= 12 u - 5 u
= 7 u
7 u = 119
1 u = 119 ÷ 7 = 17
Number of stickers that Sarah had at first
= 5 u
= 5 x 17
= 85
Answer(s): 85
