70.12% is the change from 512 to 871
Calculation steps:
[( 871 - 512 ) ÷ 512] x 100 = 70.12%
Formula
Percentage change = [(871 - 512) / 512] x 100
Subtract the new number by the original number
871 - 512 = 359
359 ÷ 512 = 0.701171875
0.701171875 x 100 = 70.12%