PSLEAt first, Leah had a total of 72 gold and white balloons. 11 white balloons burst. She then increased the number of gold balloons by 80%. After that, Leah had a total of 85 balloons. How many white balloons did she have at first?
|
Gold |
White |
Total |
Before |
5 u |
|
72 |
Change |
+ 4 u |
- 11 |
+ 13 |
After |
9 u |
|
85 |
80100 =
45Increase in the number of balloons
= 85 - 72
= 13
4 u = 13 + 11
4 u = 24
1 u = 24 ÷ 4 = 6
Number of gold balloons at first
= 5 u
= 5 x 6
= 30
Number of white balloons at first
= 72 - 30
= 42
Answer(s): 42