PSLEAt first, Leah had a total of 40 silver and red balloons. 17 red balloons burst. She then increased the number of silver balloons by 75%. After that, Leah had a total of 29 balloons. How many red balloons did she have at first?
|
Silver |
Red |
Total |
Before |
4 u |
|
40 |
Change |
+ 3 u |
- 17 |
- 11 |
After |
7 u |
|
29 |
75100 =
34Decrease in the number of balloons
= 40 - 29
= 11
3 u = 17 - 11
3 u = 6
1 u = 6 ÷ 3 = 2
Number of silver balloons at first
= 4 u
= 4 x 2
= 8
Number of red balloons at first
= 40 - 8
= 32
Answer(s): 32