-66.63% is the change from 851 to 284
Calculation steps:
[( 284 - 851 ) ÷ 851] x 100 = -66.63%
Formula
Percentage change = [(284 - 851) / 851] x 100
Subtract the new number by the original number
284 - 851 = -567
-567 ÷ 851 = -0.6662749706227967
-0.6662749706227967 x 100 = -66.63%