-68.33% is the change from 502 to 159
Calculation steps:
[( 159 - 502 ) ÷ 502] x 100 = -68.33%
Formula
Percentage change = [(159 - 502) / 502] x 100
Subtract the new number by the original number
159 - 502 = -343
-343 ÷ 502 = -0.6832669322709163
-0.6832669322709163 x 100 = -68.33%