640% is the change from 30 to 222
Calculation steps:
[( 222 - 30 ) ÷ 30] x 100 = 640%
Formula
Percentage change = [(222 - 30) / 30] x 100
Subtract the new number by the original number
222 - 30 = 192
192 ÷ 30 = 6.4
6.4 x 100 = 640%
Example