Question

Vincent always saves 30% of his monthly salary. His salary for December was 40% less than that for November. His savings for December decreased by $138 as a result. What was his salary in November?

Answer 1

Let Vincent’s salary in November be x

November savings is 30%x =0.3x
Vincent’s salary in December is 40% less than x = 0.6x
December savings = 0.3 (0.6x) = 0.18x
given difference in saving = 138
138 = 0.3x - 0.18x
138 = 0.12x
x = $1,150