64.03% is the change from 531 to 871
Calculation steps:
[( 871 - 531 ) ÷ 531] x 100 = 64.03%
Formula
Percentage change = [(871 - 531) / 531] x 100
Subtract the new number by the original number
871 - 531 = 340
340 ÷ 531 = 0.64030131826742
0.64030131826742 x 100 = 64.03%