2250% is the change from 30 to 705
Calculation steps:
[( 705 - 30 ) ÷ 30] x 100 = 2250%
Formula
Percentage change = [(705 - 30) / 30] x 100
Subtract the new number by the original number
705 - 30 = 675
675 ÷ 30 = 22.5
22.5 x 100 = 2250%
Example