-66.84% is the change from 938 to 311
Calculation steps:
[( 311 - 938 ) ÷ 938] x 100 = -66.84%
Formula
Percentage change = [(311 - 938) / 938] x 100
Subtract the new number by the original number
311 - 938 = -627
-627 ÷ 938 = -0.6684434968017058
-0.6684434968017058 x 100 = -66.84%