-67.33% is the change from 949 to 310
Calculation steps:
[( 310 - 949 ) ÷ 949] x 100 = -67.33%
Formula
Percentage change = [(310 - 949) / 949] x 100
Subtract the new number by the original number
310 - 949 = -639
-639 ÷ 949 = -0.6733403582718651
-0.6733403582718651 x 100 = -67.33%