779.45% is the change from 73 to 642
Calculation steps:
[( 642 - 73 ) ÷ 73] x 100 = 779.45%
Formula
Percentage change = [(642 - 73) / 73] x 100
Subtract the new number by the original number
642 - 73 = 569
569 ÷ 73 = 7.794520547945205
7.794520547945205 x 100 = 779.45%