PSLEAt first, Leah had a total of 71 purple and green balloons. 20 green balloons burst. She then increased the number of purple balloons by 75%. After that, Leah had a total of 81 balloons. How many green balloons did she have at first?
|
Purple |
Green |
Total |
Before |
4 u |
|
71 |
Change |
+ 3 u |
- 20 |
+ 10 |
After |
7 u |
|
81 |
75100 =
34Increase in the number of balloons
= 81 - 71
= 10
3 u = 10 + 20
3 u = 30
1 u = 30 ÷ 3 = 10
Number of purple balloons at first
= 4 u
= 4 x 10
= 40
Number of green balloons at first
= 71 - 40
= 31
Answer(s): 31