650% is the change from 30 to 225
Calculation steps:
[( 225 - 30 ) ÷ 30] x 100 = 650%
Formula
Percentage change = [(225 - 30) / 30] x 100
Subtract the new number by the original number
225 - 30 = 195
195 ÷ 30 = 6.5
6.5 x 100 = 650%
Example