-57.65% is the change from 994 to 421
Calculation steps:
[( 421 - 994 ) ÷ 994] x 100 = -57.65%
Formula
Percentage change = [(421 - 994) / 994] x 100
Subtract the new number by the original number
421 - 994 = -573
-573 ÷ 994 = -0.5764587525150905
-0.5764587525150905 x 100 = -57.65%