77.84% is the change from 501 to 891
Calculation steps:
[( 891 - 501 ) ÷ 501] x 100 = 77.84%
Formula
Percentage change = [(891 - 501) / 501] x 100
Subtract the new number by the original number
891 - 501 = 390
390 ÷ 501 = 0.7784431137724551
0.7784431137724551 x 100 = 77.84%