-18.66% is the change from 284 to 231
Calculation steps:
[( 231 - 284 ) ÷ 284] x 100 = -18.66%
Formula
Percentage change = [(231 - 284) / 284] x 100
Subtract the new number by the original number
231 - 284 = -53
-53 ÷ 284 = -0.18661971830985916
-0.18661971830985916 x 100 = -18.66%