256.63% is the change from 83 to 296
Calculation steps:
[( 296 - 83 ) ÷ 83] x 100 = 256.63%
Formula
Percentage change = [(296 - 83) / 83] x 100
Subtract the new number by the original number
296 - 83 = 213
213 ÷ 83 = 2.566265060240964
2.566265060240964 x 100 = 256.63%