-84.85% is the change from 990 to 150
Calculation steps:
[( 150 - 990 ) ÷ 990] x 100 = -84.85%
Formula
Percentage change = [(150 - 990) / 990] x 100
Subtract the new number by the original number
150 - 990 = -840
-840 ÷ 990 = -0.8484848484848485
-0.8484848484848485 x 100 = -84.85%