PSLEAt first, Leah had a total of 103 gold and red balloons. 11 red balloons burst. She then increased the number of gold balloons by 70%. After that, Leah had a total of 134 balloons. How many red balloons did she have at first?
|
Gold |
Red |
Total |
Before |
10 u |
|
103 |
Change |
+ 7 u |
- 11 |
+ 31 |
After |
17 u |
|
134 |
70100 =
710Increase in the number of balloons
= 134 - 103
= 31
7 u = 31 + 11
7 u = 42
1 u = 42 ÷ 7 = 6
Number of gold balloons at first
= 10 u
= 10 x 6
= 60
Number of red balloons at first
= 103 - 60
= 43
Answer(s): 43