1647.37% is the change from 38 to 664
Calculation steps:
[( 664 - 38 ) ÷ 38] x 100 = 1647.37%
Formula
Percentage change = [(664 - 38) / 38] x 100
Subtract the new number by the original number
664 - 38 = 626
626 ÷ 38 = 16.473684210526315
16.473684210526315 x 100 = 1647.37%