81.75% is the change from 515 to 936
Calculation steps:
[( 936 - 515 ) ÷ 515] x 100 = 81.75%
Formula
Percentage change = [(936 - 515) / 515] x 100
Subtract the new number by the original number
936 - 515 = 421
421 ÷ 515 = 0.8174757281553398
0.8174757281553398 x 100 = 81.75%