-21.8% is the change from 422 to 330
Calculation steps:
[( 330 - 422 ) ÷ 422] x 100 = -21.8%
Formula
Percentage change = [(330 - 422) / 422] x 100
Subtract the new number by the original number
330 - 422 = -92
-92 ÷ 422 = -0.21800947867298578
-0.21800947867298578 x 100 = -21.8%