-73.26% is the change from 647 to 173
Calculation steps:
[( 173 - 647 ) ÷ 647] x 100 = -73.26%
Formula
Percentage change = [(173 - 647) / 647] x 100
Subtract the new number by the original number
173 - 647 = -474
-474 ÷ 647 = -0.732612055641422
-0.732612055641422 x 100 = -73.26%