-66.49% is the change from 940 to 315
Calculation steps:
[( 315 - 940 ) ÷ 940] x 100 = -66.49%
Formula
Percentage change = [(315 - 940) / 940] x 100
Subtract the new number by the original number
315 - 940 = -625
-625 ÷ 940 = -0.6648936170212766
-0.6648936170212766 x 100 = -66.49%