81.23% is the change from 277 to 502
Calculation steps:
[( 502 - 277 ) ÷ 277] x 100 = 81.23%
Formula
Percentage change = [(502 - 277) / 277] x 100
Subtract the new number by the original number
502 - 277 = 225
225 ÷ 277 = 0.8122743682310469
0.8122743682310469 x 100 = 81.23%