-57.61% is the change from 670 to 284
Calculation steps:
[( 284 - 670 ) ÷ 670] x 100 = -57.61%
Formula
Percentage change = [(284 - 670) / 670] x 100
Subtract the new number by the original number
284 - 670 = -386
-386 ÷ 670 = -0.5761194029850746
-0.5761194029850746 x 100 = -57.61%