PSLEAt first, Leah had a total of 97 yellow and brown balloons. 19 brown balloons burst. She then increased the number of yellow balloons by 70%. After that, Leah had a total of 113 balloons. How many brown balloons did she have at first?
|
Yellow |
Brown |
Total |
Before |
10 u |
|
97 |
Change |
+ 7 u |
- 19 |
+ 16 |
After |
17 u |
|
113 |
70100 =
710Increase in the number of balloons
= 113 - 97
= 16
7 u = 16 + 19
7 u = 35
1 u = 35 ÷ 7 = 5
Number of yellow balloons at first
= 10 u
= 10 x 5
= 50
Number of brown balloons at first
= 97 - 50
= 47
Answer(s): 47