257.83% is the change from 83 to 297
Calculation steps:
[( 297 - 83 ) ÷ 83] x 100 = 257.83%
Formula
Percentage change = [(297 - 83) / 83] x 100
Subtract the new number by the original number
297 - 83 = 214
214 ÷ 83 = 2.5783132530120483
2.5783132530120483 x 100 = 257.83%