-75.72% is the change from 663 to 161
Calculation steps:
[( 161 - 663 ) ÷ 663] x 100 = -75.72%
Formula
Percentage change = [(161 - 663) / 663] x 100
Subtract the new number by the original number
161 - 663 = -502
-502 ÷ 663 = -0.7571644042232277
-0.7571644042232277 x 100 = -75.72%