-73.27% is the change from 636 to 170
Calculation steps:
[( 170 - 636 ) ÷ 636] x 100 = -73.27%
Formula
Percentage change = [(170 - 636) / 636] x 100
Subtract the new number by the original number
170 - 636 = -466
-466 ÷ 636 = -0.7327044025157232
-0.7327044025157232 x 100 = -73.27%