-57.68% is the change from 671 to 284
Calculation steps:
[( 284 - 671 ) ÷ 671] x 100 = -57.68%
Formula
Percentage change = [(284 - 671) / 671] x 100
Subtract the new number by the original number
284 - 671 = -387
-387 ÷ 671 = -0.5767511177347243
-0.5767511177347243 x 100 = -57.68%