Question

Sidney spent 30% of her monthly salary on a new laptop last month. Then she spent 50% of her salary to pay her monthly bills. She put the remaining $1,200 into her savings account. What was her monthly salary?

Answer 1

After spending 30% and 50% of it, we know that 80% of it is spent. This means the remaining 20% must be $1,200.

If we multiply this 20% value by 5, we will get 100% of the value, so her salary must be
$1200 \times 5 = 6000$