269.88% is the change from 83 to 307
Calculation steps:
[( 307 - 83 ) ÷ 83] x 100 = 269.88%
Formula
Percentage change = [(307 - 83) / 83] x 100
Subtract the new number by the original number
307 - 83 = 224
224 ÷ 83 = 2.6987951807228914
2.6987951807228914 x 100 = 269.88%