PSLEAt first, Leah had a total of 59 black and yellow balloons. 13 yellow balloons burst. She then increased the number of black balloons by 75%. After that, Leah had a total of 64 balloons. How many yellow balloons did she have at first?
|
Black |
Yellow |
Total |
Before |
4 u |
|
59 |
Change |
+ 3 u |
- 13 |
+ 5 |
After |
7 u |
|
64 |
75100 =
34Increase in the number of balloons
= 64 - 59
= 5
3 u = 5 + 13
3 u = 18
1 u = 18 ÷ 3 = 6
Number of black balloons at first
= 4 u
= 4 x 6
= 24
Number of yellow balloons at first
= 59 - 24
= 35
Answer(s): 35