-5.92% is the change from 659 to 620
Calculation steps:
[( 620 - 659 ) ÷ 659] x 100 = -5.92%
Formula
Percentage change = [(620 - 659) / 659] x 100
Subtract the new number by the original number
620 - 659 = -39
-39 ÷ 659 = -0.05918057663125948
-0.05918057663125948 x 100 = -5.92%