-15.25% is the change from 590 to 500
Calculation steps:
[( 500 - 590 ) ÷ 590] x 100 = -15.25%
Formula
Percentage change = [(500 - 590) / 590] x 100
Subtract the new number by the original number
500 - 590 = -90
-90 ÷ 590 = -0.15254237288135594
-0.15254237288135594 x 100 = -15.25%