-67.12% is the change from 949 to 312
Calculation steps:
[( 312 - 949 ) ÷ 949] x 100 = -67.12%
Formula
Percentage change = [(312 - 949) / 949] x 100
Subtract the new number by the original number
312 - 949 = -637
-637 ÷ 949 = -0.6712328767123288
-0.6712328767123288 x 100 = -67.12%