-75.12% is the change from 647 to 161
Calculation steps:
[( 161 - 647 ) ÷ 647] x 100 = -75.12%
Formula
Percentage change = [(161 - 647) / 647] x 100
Subtract the new number by the original number
161 - 647 = -486
-486 ÷ 647 = -0.7511591962905718
-0.7511591962905718 x 100 = -75.12%