Jen had 154 more coins than Tiffany. After Tiffany gave away
15 of her coins, Jen had thrice as many coins as Tiffany. How many coins did Tiffany have at first?
| |
Jen |
Tiffany |
Comparing Jen
and Tiffany at first |
154 more |
|
| Before |
12 u |
5 u |
| Change |
|
- 1 u |
| After |
|
4 u |
Comparing Jen
and Tiffany in the end |
3x4 =
12 u |
1x4 =
4 u |
The number of coins that Jen had at first and in the end remains unchanged. Make the number of coins that Jen had the same. LCM of 12 and 3 is 12.
Number of coins that Jen had more than Tiffany at first
= 12 u - 5 u
= 7 u
7 u = 154
1 u = 154 ÷ 7 = 22
Number of coins that Tiffany had at first
= 5 u
= 5 x 22
= 110
Answer(s): 110
