-69.72% is the change from 284 to 86
Calculation steps:
[( 86 - 284 ) ÷ 284] x 100 = -69.72%
Formula
Percentage change = [(86 - 284) / 284] x 100
Subtract the new number by the original number
86 - 284 = -198
-198 ÷ 284 = -0.6971830985915493
-0.6971830985915493 x 100 = -69.72%