-9.98% is the change from 421 to 379
Calculation steps:
[( 379 - 421 ) ÷ 421] x 100 = -9.98%
Formula
Percentage change = [(379 - 421) / 421] x 100
Subtract the new number by the original number
379 - 421 = -42
-42 ÷ 421 = -0.0997624703087886
-0.0997624703087886 x 100 = -9.98%