1990% is the change from 30 to 627
Calculation steps:
[( 627 - 30 ) ÷ 30] x 100 = 1990%
Formula
Percentage change = [(627 - 30) / 30] x 100
Subtract the new number by the original number
627 - 30 = 597
597 ÷ 30 = 19.9
19.9 x 100 = 1990%
Example