PSLEAt first, Leah had a total of 73 gold and brown balloons. 17 brown balloons burst. She then increased the number of gold balloons by 80%. After that, Leah had a total of 88 balloons. How many brown balloons did she have at first?
|
Gold |
Brown |
Total |
Before |
5 u |
|
73 |
Change |
+ 4 u |
- 17 |
+ 15 |
After |
9 u |
|
88 |
80100 =
45Increase in the number of balloons
= 88 - 73
= 15
4 u = 15 + 17
4 u = 32
1 u = 32 ÷ 4 = 8
Number of gold balloons at first
= 5 u
= 5 x 8
= 40
Number of brown balloons at first
= 73 - 40
= 33
Answer(s): 33