-20.92% is the change from 784 to 620
Calculation steps:
[( 620 - 784 ) ÷ 784] x 100 = -20.92%
Formula
Percentage change = [(620 - 784) / 784] x 100
Subtract the new number by the original number
620 - 784 = -164
-164 ÷ 784 = -0.20918367346938777
-0.20918367346938777 x 100 = -20.92%