-70.18% is the change from 939 to 280
Calculation steps:
[( 280 - 939 ) ÷ 939] x 100 = -70.18%
Formula
Percentage change = [(280 - 939) / 939] x 100
Subtract the new number by the original number
280 - 939 = -659
-659 ÷ 939 = -0.7018104366347178
-0.7018104366347178 x 100 = -70.18%