-23.2% is the change from 651 to 500
Calculation steps:
[( 500 - 651 ) ÷ 651] x 100 = -23.2%
Formula
Percentage change = [(500 - 651) / 651] x 100
Subtract the new number by the original number
500 - 651 = -151
-151 ÷ 651 = -0.23195084485407066
-0.23195084485407066 x 100 = -23.2%