PSLEAt first, Leah had a total of 56 green and silver balloons. 15 silver balloons burst. She then increased the number of green balloons by 70%. After that, Leah had a total of 55 balloons. How many silver balloons did she have at first?
|
Green |
Silver |
Total |
Before |
10 u |
|
56 |
Change |
+ 7 u |
- 15 |
- 1 |
After |
17 u |
|
55 |
70100 =
710Decrease in the number of balloons
= 56 - 55
= 1
7 u = 15 - 1
7 u = 14
1 u = 14 ÷ 7 = 2
Number of green balloons at first
= 10 u
= 10 x 2
= 20
Number of silver balloons at first
= 56 - 20
= 36
Answer(s): 36