-27.5% is the change from 949 to 688
Calculation steps:
[( 688 - 949 ) ÷ 949] x 100 = -27.5%
Formula
Percentage change = [(688 - 949) / 949] x 100
Subtract the new number by the original number
688 - 949 = -261
-261 ÷ 949 = -0.27502634351949423
-0.27502634351949423 x 100 = -27.5%