-31.34% is the change from 501 to 344
Calculation steps:
[( 344 - 501 ) ÷ 501] x 100 = -31.34%
Formula
Percentage change = [(344 - 501) / 501] x 100
Subtract the new number by the original number
344 - 501 = -157
-157 ÷ 501 = -0.313373253493014
-0.313373253493014 x 100 = -31.34%