PSLEAt first, Leah had a total of 57 yellow and grey balloons. 18 grey balloons burst. She then increased the number of yellow balloons by 75%. After that, Leah had a total of 48 balloons. How many grey balloons did she have at first?
|
Yellow |
Grey |
Total |
Before |
4 u |
|
57 |
Change |
+ 3 u |
- 18 |
- 9 |
After |
7 u |
|
48 |
75100 =
34Decrease in the number of balloons
= 57 - 48
= 9
3 u = 18 - 9
3 u = 9
1 u = 9 ÷ 3 = 3
Number of yellow balloons at first
= 4 u
= 4 x 3
= 12
Number of grey balloons at first
= 57 - 12
= 45
Answer(s): 45