-70.5% is the change from 949 to 280
Calculation steps:
[( 280 - 949 ) ÷ 949] x 100 = -70.5%
Formula
Percentage change = [(280 - 949) / 949] x 100
Subtract the new number by the original number
280 - 949 = -669
-669 ÷ 949 = -0.7049525816649105
-0.7049525816649105 x 100 = -70.5%