PSLEAt first, Leah had a total of 45 black and pink balloons. 20 pink balloons burst. She then increased the number of black balloons by 75%. After that, Leah had a total of 34 balloons. How many pink balloons did she have at first?
|
Black |
Pink |
Total |
Before |
4 u |
|
45 |
Change |
+ 3 u |
- 20 |
- 11 |
After |
7 u |
|
34 |
75100 =
34Decrease in the number of balloons
= 45 - 34
= 11
3 u = 20 - 11
3 u = 9
1 u = 9 ÷ 3 = 3
Number of black balloons at first
= 4 u
= 4 x 3
= 12
Number of pink balloons at first
= 45 - 12
= 33
Answer(s): 33