-48.4% is the change from 814 to 420
Calculation steps:
[( 420 - 814 ) ÷ 814] x 100 = -48.4%
Formula
Percentage change = [(420 - 814) / 814] x 100
Subtract the new number by the original number
420 - 814 = -394
-394 ÷ 814 = -0.48402948402948404
-0.48402948402948404 x 100 = -48.4%