-57.36% is the change from 666 to 284
Calculation steps:
[( 284 - 666 ) ÷ 666] x 100 = -57.36%
Formula
Percentage change = [(284 - 666) / 666] x 100
Subtract the new number by the original number
284 - 666 = -382
-382 ÷ 666 = -0.5735735735735735
-0.5735735735735735 x 100 = -57.36%