1271.05% is the change from 38 to 521
Calculation steps:
[( 521 - 38 ) ÷ 38] x 100 = 1271.05%
Formula
Percentage change = [(521 - 38) / 38] x 100
Subtract the new number by the original number
521 - 38 = 483
483 ÷ 38 = 12.710526315789474
12.710526315789474 x 100 = 1271.05%