319.18% is the change from 73 to 306
Calculation steps:
[( 306 - 73 ) ÷ 73] x 100 = 319.18%
Formula
Percentage change = [(306 - 73) / 73] x 100
Subtract the new number by the original number
306 - 73 = 233
233 ÷ 73 = 3.191780821917808
3.191780821917808 x 100 = 319.18%