PSLEAt first, Leah had a total of 134 white and purple balloons. 10 purple balloons burst. She then increased the number of white balloons by 70%. After that, Leah had a total of 187 balloons. How many purple balloons did she have at first?
|
White |
Purple |
Total |
Before |
10 u |
|
134 |
Change |
+ 7 u |
- 10 |
+ 53 |
After |
17 u |
|
187 |
70100 =
710Increase in the number of balloons
= 187 - 134
= 53
7 u = 53 + 10
7 u = 63
1 u = 63 ÷ 7 = 9
Number of white balloons at first
= 10 u
= 10 x 9
= 90
Number of purple balloons at first
= 134 - 90
= 44
Answer(s): 44