3135% is the change from 20 to 647
Calculation steps:
[( 647 - 20 ) ÷ 20] x 100 = 3135%
Formula
Percentage change = [(647 - 20) / 20] x 100
Subtract the new number by the original number
647 - 20 = 627
627 ÷ 20 = 31.35
31.35 x 100 = 3135%
Example