-66.38% is the change from 931 to 313
Calculation steps:
[( 313 - 931 ) ÷ 931] x 100 = -66.38%
Formula
Percentage change = [(313 - 931) / 931] x 100
Subtract the new number by the original number
313 - 931 = -618
-618 ÷ 931 = -0.6638023630504833
-0.6638023630504833 x 100 = -66.38%