87.73% is the change from 277 to 520
Calculation steps:
[( 520 - 277 ) ÷ 277] x 100 = 87.73%
Formula
Percentage change = [(520 - 277) / 277] x 100
Subtract the new number by the original number
520 - 277 = 243
243 ÷ 277 = 0.8772563176895307
0.8772563176895307 x 100 = 87.73%