307.94% is the change from 63 to 257
Calculation steps:
[( 257 - 63 ) ÷ 63] x 100 = 307.94%
Formula
Percentage change = [(257 - 63) / 63] x 100
Subtract the new number by the original number
257 - 63 = 194
194 ÷ 63 = 3.0793650793650795
3.0793650793650795 x 100 = 307.94%