1660% is the change from 30 to 528
Calculation steps:
[( 528 - 30 ) ÷ 30] x 100 = 1660%
Formula
Percentage change = [(528 - 30) / 30] x 100
Subtract the new number by the original number
528 - 30 = 498
498 ÷ 30 = 16.6
16.6 x 100 = 1660%
Example