-96.49% is the change from 285 to 10
Calculation steps:
[( 10 - 285 ) ÷ 285] x 100 = -96.49%
Formula
Percentage change = [(10 - 285) / 285] x 100
Subtract the new number by the original number
10 - 285 = -275
-275 ÷ 285 = -0.9649122807017544
-0.9649122807017544 x 100 = -96.49%