-69.89% is the change from 930 to 280
Calculation steps:
[( 280 - 930 ) ÷ 930] x 100 = -69.89%
Formula
Percentage change = [(280 - 930) / 930] x 100
Subtract the new number by the original number
280 - 930 = -650
-650 ÷ 930 = -0.6989247311827957
-0.6989247311827957 x 100 = -69.89%