-34.27% is the change from 426 to 280
Calculation steps:
[( 280 - 426 ) ÷ 426] x 100 = -34.27%
Formula
Percentage change = [(280 - 426) / 426] x 100
Subtract the new number by the original number
280 - 426 = -146
-146 ÷ 426 = -0.3427230046948357
-0.3427230046948357 x 100 = -34.27%
Example