-76.71% is the change from 73 to 17
Calculation steps:
[( 17 - 73 ) ÷ 73] x 100 = -76.71%
Formula
Percentage change = [(17 - 73) / 73] x 100
Subtract the new number by the original number
17 - 73 = -56
-56 ÷ 73 = -0.7671232876712328
-0.7671232876712328 x 100 = -76.71%