Lynn and Hazel collected coins. Lynn gave 20% of her coins to Hazel. As a result, Hazel's coins increased by 75%. If Lynn had 48 coins left, find the total number of coins the two girls had at first.
| |
Lynn |
Hazel |
Comparing the change
in Hazel's coins |
| Before |
5x3 =
15 u |
|
4x1 =
4 u |
| Change |
- 1x3 =
- 3 u |
+ 1x3 =
+ 3 u |
+ 3x1 =
+ 3 u |
| After |
4x3 =
12 u |
|
7x1 =
7 u |
20% =
20100 =
15 75% =
75100 =
34 The number of coins that Lynn gave to Hazel is repeated. Make the number of coins that Lynn gave to Hazel the same. LCM of 1 and 3 is 3.
Number of coins that Lynn had in the end = 12 u
12 u = 48
1 u = 48 ÷ 12 = 4
Number of coins that Lynn and Hazel had at first
= 15 u + 4 u
= 19 u
= 19 x 4
= 76
Answer(s): 76
