-61.95% is the change from 502 to 191
Calculation steps:
[( 191 - 502 ) ÷ 502] x 100 = -61.95%
Formula
Percentage change = [(191 - 502) / 502] x 100
Subtract the new number by the original number
191 - 502 = -311
-311 ÷ 502 = -0.6195219123505976
-0.6195219123505976 x 100 = -61.95%