-37.65% is the change from 502 to 313
Calculation steps:
[( 313 - 502 ) ÷ 502] x 100 = -37.65%
Formula
Percentage change = [(313 - 502) / 502] x 100
Subtract the new number by the original number
313 - 502 = -189
-189 ÷ 502 = -0.37649402390438247
-0.37649402390438247 x 100 = -37.65%