Three women, Roshel, Kathy and Yen went on a shopping spree. 30% of Roshel's spending was equal to
12 of Kathy's spending. Yen's spending was 60% less than Kathy's. If Kathy spent $540 less, she would spend the same amount of money as Yen.
- Find the ratio of Roshel's spending to Kathy's to Yen's.
- How much did Yen spend?
Roshel |
Kathy |
Yen |
5x5 |
3x5 |
|
|
5x3 |
2x3 |
25 u |
15 u |
6 u |
(a)
30%=
30100 =
310 310 of Roshel's spending is equal to
12 of Kathy's spending. Make the numerators the same. LCM of 3 and 1 is 3.
310 of Roshel's spending =
12 of Kathy's spending
310 of Roshel's spending =
1x32x3 of Kathy's spending
310 of Roshel's spending =
36 of Kathy's spending
Roshel : Kathy
10 : 6
5 : 3
Yen's spending in percent when compared to Kathy's
= 100% - 60%
= 40%
Kathy : Yen
100 : 40
5 : 2
Kathy's spending is the repeated identity. Make Kathy's spending the same. LCM of 3 and 5 is 15.
Roshel : Kathy : Yen
25 : 15 : 6
(b)
|
Roshel |
Kathy |
Yen |
Before |
25 u |
15 u |
6 u |
Change |
|
- 9 u |
|
After |
25 u |
6 u |
6 u |
Additional amount that Kathy would have to spend less to be the same as Yen
= 15 u - 6 u
= 9 u
9 u = 540
1 u = 540 ÷ 9 = 60
Amount that Yen spent
= 6 u
= 6 x 60
= $360
Answer(s): (a) 25 : 15 : 6; (b) $360