950% is the change from 30 to 315
Calculation steps:
[( 315 - 30 ) ÷ 30] x 100 = 950%
Formula
Percentage change = [(315 - 30) / 30] x 100
Subtract the new number by the original number
315 - 30 = 285
285 ÷ 30 = 9.5
9.5 x 100 = 950%
Example