-21.22% is the change from 787 to 620
Calculation steps:
[( 620 - 787 ) ÷ 787] x 100 = -21.22%
Formula
Percentage change = [(620 - 787) / 787] x 100
Subtract the new number by the original number
620 - 787 = -167
-167 ÷ 787 = -0.2121982210927573
-0.2121982210927573 x 100 = -21.22%