1234.21% is the change from 38 to 507
Calculation steps:
[( 507 - 38 ) ÷ 38] x 100 = 1234.21%
Formula
Percentage change = [(507 - 38) / 38] x 100
Subtract the new number by the original number
507 - 38 = 469
469 ÷ 38 = 12.342105263157896
12.342105263157896 x 100 = 1234.21%