79.84% is the change from 501 to 901
Calculation steps:
[( 901 - 501 ) ÷ 501] x 100 = 79.84%
Formula
Percentage change = [(901 - 501) / 501] x 100
Subtract the new number by the original number
901 - 501 = 400
400 ÷ 501 = 0.7984031936127745
0.7984031936127745 x 100 = 79.84%