237.35% is the change from 83 to 280
Calculation steps:
[( 280 - 83 ) ÷ 83] x 100 = 237.35%
Formula
Percentage change = [(280 - 83) / 83] x 100
Subtract the new number by the original number
280 - 83 = 197
197 ÷ 83 = 2.3734939759036147
2.3734939759036147 x 100 = 237.35%