-21.14% is the change from 634 to 500
Calculation steps:
[( 500 - 634 ) ÷ 634] x 100 = -21.14%
Formula
Percentage change = [(500 - 634) / 634] x 100
Subtract the new number by the original number
500 - 634 = -134
-134 ÷ 634 = -0.2113564668769716
-0.2113564668769716 x 100 = -21.14%