-66.99% is the change from 942 to 311
Calculation steps:
[( 311 - 942 ) ÷ 942] x 100 = -66.99%
Formula
Percentage change = [(311 - 942) / 942] x 100
Subtract the new number by the original number
311 - 942 = -631
-631 ÷ 942 = -0.6698513800424628
-0.6698513800424628 x 100 = -66.99%