PSLEAt first, Leah had a total of 86 purple and green balloons. 10 green balloons burst. She then increased the number of purple balloons by 90%. After that, Leah had a total of 121 balloons. How many green balloons did she have at first?
|
Purple |
Green |
Total |
Before |
10 u |
|
86 |
Change |
+ 9 u |
- 10 |
+ 35 |
After |
19 u |
|
121 |
90100 =
910Increase in the number of balloons
= 121 - 86
= 35
9 u = 35 + 10
9 u = 45
1 u = 45 ÷ 9 = 5
Number of purple balloons at first
= 10 u
= 10 x 5
= 50
Number of green balloons at first
= 86 - 50
= 36
Answer(s): 36