PSLEAt first, Leah had a total of 66 red and gold balloons. 15 gold balloons burst. She then increased the number of red balloons by 70%. After that, Leah had a total of 65 balloons. How many gold balloons did she have at first?
|
Red |
Gold |
Total |
Before |
10 u |
|
66 |
Change |
+ 7 u |
- 15 |
- 1 |
After |
17 u |
|
65 |
70100 =
710Decrease in the number of balloons
= 66 - 65
= 1
7 u = 15 - 1
7 u = 14
1 u = 14 ÷ 7 = 2
Number of red balloons at first
= 10 u
= 10 x 2
= 20
Number of gold balloons at first
= 66 - 20
= 46
Answer(s): 46