-71.8% is the change from 851 to 240
Calculation steps:
[( 240 - 851 ) ÷ 851] x 100 = -71.8%
Formula
Percentage change = [(240 - 851) / 851] x 100
Subtract the new number by the original number
240 - 851 = -611
-611 ÷ 851 = -0.717978848413631
-0.717978848413631 x 100 = -71.8%