PSLEAt first, Leah had a total of 150 gold and green balloons. 12 green balloons burst. She then increased the number of gold balloons by 90%. After that, Leah had a total of 228 balloons. How many green balloons did she have at first?
|
Gold |
Green |
Total |
Before |
10 u |
|
150 |
Change |
+ 9 u |
- 12 |
+ 78 |
After |
19 u |
|
228 |
90100 =
910Increase in the number of balloons
= 228 - 150
= 78
9 u = 78 + 12
9 u = 90
1 u = 90 ÷ 9 = 10
Number of gold balloons at first
= 10 u
= 10 x 10
= 100
Number of green balloons at first
= 150 - 100
= 50
Answer(s): 50