-66.95% is the change from 938 to 310
Calculation steps:
[( 310 - 938 ) ÷ 938] x 100 = -66.95%
Formula
Percentage change = [(310 - 938) / 938] x 100
Subtract the new number by the original number
310 - 938 = -628
-628 ÷ 938 = -0.6695095948827292
-0.6695095948827292 x 100 = -66.95%