PSLEAt first, Leah had a total of 147 green and brown balloons. 19 brown balloons burst. She then increased the number of green balloons by 70%. After that, Leah had a total of 198 balloons. How many brown balloons did she have at first?
|
Green |
Brown |
Total |
Before |
10 u |
|
147 |
Change |
+ 7 u |
- 19 |
+ 51 |
After |
17 u |
|
198 |
70100 =
710Increase in the number of balloons
= 198 - 147
= 51
7 u = 51 + 19
7 u = 70
1 u = 70 ÷ 7 = 10
Number of green balloons at first
= 10 u
= 10 x 10
= 100
Number of brown balloons at first
= 147 - 100
= 47
Answer(s): 47