304.76% is the change from 63 to 255
Calculation steps:
[( 255 - 63 ) ÷ 63] x 100 = 304.76%
Formula
Percentage change = [(255 - 63) / 63] x 100
Subtract the new number by the original number
255 - 63 = 192
192 ÷ 63 = 3.0476190476190474
3.0476190476190474 x 100 = 304.76%