-31.08% is the change from 502 to 346
Calculation steps:
[( 346 - 502 ) ÷ 502] x 100 = -31.08%
Formula
Percentage change = [(346 - 502) / 502] x 100
Subtract the new number by the original number
346 - 502 = -156
-156 ÷ 502 = -0.3107569721115538
-0.3107569721115538 x 100 = -31.08%