-38.84% is the change from 502 to 307
Calculation steps:
[( 307 - 502 ) ÷ 502] x 100 = -38.84%
Formula
Percentage change = [(307 - 502) / 502] x 100
Subtract the new number by the original number
307 - 502 = -195
-195 ÷ 502 = -0.3884462151394422
-0.3884462151394422 x 100 = -38.84%