1987.1% is the change from 31 to 647
Calculation steps:
[( 647 - 31 ) ÷ 31] x 100 = 1987.1%
Formula
Percentage change = [(647 - 31) / 31] x 100
Subtract the new number by the original number
647 - 31 = 616
616 ÷ 31 = 19.870967741935484
19.870967741935484 x 100 = 1987.1%