-91.73% is the change from 278 to 23
Calculation steps:
[( 23 - 278 ) ÷ 278] x 100 = -91.73%
Formula
Percentage change = [(23 - 278) / 278] x 100
Subtract the new number by the original number
23 - 278 = -255
-255 ÷ 278 = -0.9172661870503597
-0.9172661870503597 x 100 = -91.73%