-13.97% is the change from 501 to 431
Calculation steps:
[( 431 - 501 ) ÷ 501] x 100 = -13.97%
Formula
Percentage change = [(431 - 501) / 501] x 100
Subtract the new number by the original number
431 - 501 = -70
-70 ÷ 501 = -0.13972055888223553
-0.13972055888223553 x 100 = -13.97%