-67.65% is the change from 949 to 307
Calculation steps:
[( 307 - 949 ) ÷ 949] x 100 = -67.65%
Formula
Percentage change = [(307 - 949) / 949] x 100
Subtract the new number by the original number
307 - 949 = -642
-642 ÷ 949 = -0.6765015806111696
-0.6765015806111696 x 100 = -67.65%