-78.42% is the change from 621 to 134
Calculation steps:
[( 134 - 621 ) ÷ 621] x 100 = -78.42%
Formula
Percentage change = [(134 - 621) / 621] x 100
Subtract the new number by the original number
134 - 621 = -487
-487 ÷ 621 = -0.784219001610306
-0.784219001610306 x 100 = -78.42%