50.9% is the change from 277 to 418
Calculation steps:
[( 418 - 277 ) ÷ 277] x 100 = 50.9%
Formula
Percentage change = [(418 - 277) / 277] x 100
Subtract the new number by the original number
418 - 277 = 141
141 ÷ 277 = 0.5090252707581228
0.5090252707581228 x 100 = 50.9%