1400% is the change from 21 to 315
Calculation steps:
[( 315 - 21 ) ÷ 21] x 100 = 1400%
Formula
Percentage change = [(315 - 21) / 21] x 100
Subtract the new number by the original number
315 - 21 = 294
294 ÷ 21 = 14
14 x 100 = 1400%
Example