Oliver and Ethan earned the same amount each month. Oliver saved
23 of his pay and Ethan saved
27 of his pay. Oliver saved $140 more than Ethan in a month. How much did Ethan save in a month?
|
Oliver |
Ethan |
Before |
3x7 = 21 u |
7x3 = 21 u |
Change |
- 2x7 = - 14 u |
- 2x3 = - 6 u |
After |
1x7 = 7 u |
5x3 = 15 u |
The amount that Oliver and Ethan each earned in a month is the same. Make the amount the same. LCM of 3 and 7 is 21.
Amount that Oliver saved more than Ethan
= 14 u - 6 u
= 8 u
8 u = 140
1 u = 140 ÷ 8 = 140
Amount that Ethan saved in a month
= 6 u
= 6 x 140
= $840
Answer(s): $840