-20.79% is the change from 784 to 621
Calculation steps:
[( 621 - 784 ) ÷ 784] x 100 = -20.79%
Formula
Percentage change = [(621 - 784) / 784] x 100
Subtract the new number by the original number
621 - 784 = -163
-163 ÷ 784 = -0.20790816326530612
-0.20790816326530612 x 100 = -20.79%