Raeann and Zara collected stamps. Raeann gave 20% of her stamps to Zara. As a result, Zara's stamps increased by 60%. If Raeann had 36 stamps left, find the total number of stamps the two girls had at first.
| |
Raeann |
Zara |
Comparing the change
in Zara's stamps |
| Before |
5x3 =
15 u |
|
5x1 =
5 u |
| Change |
- 1x3 =
- 3 u |
+ 1x3 =
+ 3 u |
+ 3x1 =
+ 3 u |
| After |
4x3 =
12 u |
|
8x1 =
8 u |
20% =
20100 =
15 60% =
60100 =
35 The number of stamps that Raeann gave to Zara is repeated. Make the number of stamps that Raeann gave to Zara the same. LCM of 1 and 3 is 3.
Number of stamps that Raeann had in the end = 12 u
12 u = 36
1 u = 36 ÷ 12 = 3
Number of stamps that Raeann and Zara had at first
= 15 u + 5 u
= 20 u
= 20 x 3
= 60
Answer(s): 60
