275% is the change from 84 to 315
Calculation steps:
[( 315 - 84 ) ÷ 84] x 100 = 275%
Formula
Percentage change = [(315 - 84) / 84] x 100
Subtract the new number by the original number
315 - 84 = 231
231 ÷ 84 = 2.75
2.75 x 100 = 275%
Example