1247.37% is the change from 38 to 512
Calculation steps:
[( 512 - 38 ) ÷ 38] x 100 = 1247.37%
Formula
Percentage change = [(512 - 38) / 38] x 100
Subtract the new number by the original number
512 - 38 = 474
474 ÷ 38 = 12.473684210526315
12.473684210526315 x 100 = 1247.37%