64.62% is the change from 277 to 456
Calculation steps:
[( 456 - 277 ) ÷ 277] x 100 = 64.62%
Formula
Percentage change = [(456 - 277) / 277] x 100
Subtract the new number by the original number
456 - 277 = 179
179 ÷ 277 = 0.6462093862815884
0.6462093862815884 x 100 = 64.62%