283.13% is the change from 83 to 318
Calculation steps:
[( 318 - 83 ) ÷ 83] x 100 = 283.13%
Formula
Percentage change = [(318 - 83) / 83] x 100
Subtract the new number by the original number
318 - 83 = 235
235 ÷ 83 = 2.8313253012048194
2.8313253012048194 x 100 = 283.13%