Julie had 87 more coins than Fiona. After Fiona gave away
13 of her coins, Julie had thrice as many coins as Fiona. How many coins did Fiona have at first?
| |
Julie |
Fiona |
Comparing Julie
and Fiona at first |
87 more |
|
| Before |
6 u |
3 u |
| Change |
|
- 1 u |
| After |
|
2 u |
Comparing Julie
and Fiona in the end |
3x2 =
6 u |
1x2 =
2 u |
The number of coins that Julie had at first and in the end remains unchanged. Make the number of coins that Julie had the same. LCM of 6 and 3 is 6.
Number of coins that Julie had more than Fiona at first
= 6 u - 3 u
= 3 u
3 u = 87
1 u = 87 ÷ 3 = 29
Number of coins that Fiona had at first
= 3 u
= 3 x 29
= 87
Answer(s): 87
