PSLEAt first, Leah had a total of 65 black and yellow balloons. 15 yellow balloons burst. She then increased the number of black balloons by 75%. After that, Leah had a total of 62 balloons. How many yellow balloons did she have at first?
|
Black |
Yellow |
Total |
Before |
4 u |
|
65 |
Change |
+ 3 u |
- 15 |
- 3 |
After |
7 u |
|
62 |
75100 =
34Decrease in the number of balloons
= 65 - 62
= 3
3 u = 15 - 3
3 u = 12
1 u = 12 ÷ 3 = 4
Number of black balloons at first
= 4 u
= 4 x 4
= 16
Number of yellow balloons at first
= 65 - 16
= 49
Answer(s): 49