-96.4% is the change from 278 to 10
Calculation steps:
[( 10 - 278 ) ÷ 278] x 100 = -96.4%
Formula
Percentage change = [(10 - 278) / 278] x 100
Subtract the new number by the original number
10 - 278 = -268
-268 ÷ 278 = -0.9640287769784173
-0.9640287769784173 x 100 = -96.4%