71.12% is the change from 509 to 871
Calculation steps:
[( 871 - 509 ) ÷ 509] x 100 = 71.12%
Formula
Percentage change = [(871 - 509) / 509] x 100
Subtract the new number by the original number
871 - 509 = 362
362 ÷ 509 = 0.7111984282907662
0.7111984282907662 x 100 = 71.12%