-84.48% is the change from 290 to 45
Calculation steps:
[( 45 - 290 ) ÷ 290] x 100 = -84.48%
Formula
Percentage change = [(45 - 290) / 290] x 100
Subtract the new number by the original number
45 - 290 = -245
-245 ÷ 290 = -0.8448275862068966
-0.8448275862068966 x 100 = -84.48%