PSLEAt first, Leah had a total of 109 blue and green balloons. 16 green balloons burst. She then increased the number of blue balloons by 90%. After that, Leah had a total of 147 balloons. How many green balloons did she have at first?
|
Blue |
Green |
Total |
Before |
10 u |
|
109 |
Change |
+ 9 u |
- 16 |
+ 38 |
After |
19 u |
|
147 |
90100 =
910Increase in the number of balloons
= 147 - 109
= 38
9 u = 38 + 16
9 u = 54
1 u = 54 ÷ 9 = 6
Number of blue balloons at first
= 10 u
= 10 x 6
= 60
Number of green balloons at first
= 109 - 60
= 49
Answer(s): 49