1670% is the change from 30 to 531
Calculation steps:
[( 531 - 30 ) ÷ 30] x 100 = 1670%
Formula
Percentage change = [(531 - 30) / 30] x 100
Subtract the new number by the original number
531 - 30 = 501
501 ÷ 30 = 16.7
16.7 x 100 = 1670%
Example