86.38% is the change from 257 to 479
Calculation steps:
[( 479 - 257 ) ÷ 257] x 100 = 86.38%
Formula
Percentage change = [(479 - 257) / 257] x 100
Subtract the new number by the original number
479 - 257 = 222
222 ÷ 257 = 0.8638132295719845
0.8638132295719845 x 100 = 86.38%