Sabrina spent
35 of her salary on a microwave oven and
35 of the remainder on a kettle. If she saved the remaining $144, how much was her salary?
Fraction of the salary spent on the microwave oven =
35 Fraction of the salary on the remainder
= 1 -
35 =
25 Fraction of the remainder on savings
= 1 -
35 =
25
Microwave Oven |
Remainder |
Total |
3x5 |
2x5 |
5x5 |
|
Kettle |
Savings |
|
|
3x2 |
2x2 |
|
15 u |
6 u |
4 u |
25 u |
The remainder and the total amount on the kettle and the savings are the same. Make the remainder and the total amount on the kettle and the savings the same. LCM of 2 and 5 is 10.
Total salary = 25 u
Amount spent of the microwave oven = 15 u
Amount spent on the kettle = 6 u
Amount of savings = 4 u
4 u = 144
1 u = 144 ÷ 4 = 36
Sabrina's salary
= 25 u
= 25 x 36
= $900
Answer(s): $900