-40% is the change from 485 to 291
Calculation steps:
[( 291 - 485 ) ÷ 485] x 100 = -40%
Formula
Percentage change = [(291 - 485) / 485] x 100
Subtract the new number by the original number
291 - 485 = -194
-194 ÷ 485 = -0.4
-0.4 x 100 = -40%
Example