-42.89% is the change from 949 to 542
Calculation steps:
[( 542 - 949 ) ÷ 949] x 100 = -42.89%
Formula
Percentage change = [(542 - 949) / 949] x 100
Subtract the new number by the original number
542 - 949 = -407
-407 ÷ 949 = -0.42887249736564803
-0.42887249736564803 x 100 = -42.89%