PSLEAt first, Leah had a total of 92 purple and blue balloons. 18 blue balloons burst. She then increased the number of purple balloons by 70%. After that, Leah had a total of 116 balloons. How many blue balloons did she have at first?
|
Purple |
Blue |
Total |
Before |
10 u |
|
92 |
Change |
+ 7 u |
- 18 |
+ 24 |
After |
17 u |
|
116 |
70100 =
710Increase in the number of balloons
= 116 - 92
= 24
7 u = 24 + 18
7 u = 42
1 u = 42 ÷ 7 = 6
Number of purple balloons at first
= 10 u
= 10 x 6
= 60
Number of blue balloons at first
= 92 - 60
= 32
Answer(s): 32