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P6 Mathematics

Question post on Tue, 14/02/2017 2:20pm

Susan saves 20% of her salary each month. She found that if her salary were to increase by 10%, her saving would increase by $20. Find Susan’s salary

please help to solve by using algebra method. thank you so much.

Answer

alfretztay · Answer 1 · Post on Mon, 31/12/2018 5:46pm

Susan saves 20% of her salary each month. She found that if her salary were to increase by 10%, her savings would increase by $20. Find Susan’s salary.

salary : savings
10 units : 2 units
11 units (if her salary were to increase by 10%) : 2.2 units

0.2 units = $20
10 units = $1000

Ans : $1000.

Jmaths.SG · Answer 2 · Post on Tue, 14/02/2017 6:43pm

Jmaths.SG Post on Tue, 14/02/2017 6:43pm

Jmaths.SG · Answer 3 · Post on Tue, 14/02/2017 6:43pm

Jmaths.SG

Post on Tue, 14/02/2017 6:43pm

BigDevil · Answer 4 · Post on Tue, 14/02/2017 4:24pm

Susan’s salary at first is 100u

She saves (20% x 100u) = 20u

If her salary increases by 10% to (110% x 100u) = 110u

Her savings will increase to 20% x 110u = 22u

22u – 20u = $20

2u = $20

1u = $10

100u = $1000

Susan’s salary is $1000.