1700% is the change from 30 to 540
Calculation steps:
[( 540 - 30 ) ÷ 30] x 100 = 1700%
Formula
Percentage change = [(540 - 30) / 30] x 100
Subtract the new number by the original number
540 - 30 = 510
510 ÷ 30 = 17
17 x 100 = 1700%
Example