PSLEAt first, Leah had a total of 84 purple and brown balloons. 11 brown balloons burst. She then increased the number of purple balloons by 70%. After that, Leah had a total of 101 balloons. How many brown balloons did she have at first?
|
Purple |
Brown |
Total |
Before |
10 u |
|
84 |
Change |
+ 7 u |
- 11 |
+ 17 |
After |
17 u |
|
101 |
70100 =
710Increase in the number of balloons
= 101 - 84
= 17
7 u = 17 + 11
7 u = 28
1 u = 28 ÷ 7 = 4
Number of purple balloons at first
= 10 u
= 10 x 4
= 40
Number of brown balloons at first
= 84 - 40
= 44
Answer(s): 44