-37.92% is the change from 501 to 311
Calculation steps:
[( 311 - 501 ) ÷ 501] x 100 = -37.92%
Formula
Percentage change = [(311 - 501) / 501] x 100
Subtract the new number by the original number
311 - 501 = -190
-190 ÷ 501 = -0.37924151696606784
-0.37924151696606784 x 100 = -37.92%