-82.42% is the change from 421 to 74
Calculation steps:
[( 74 - 421 ) ÷ 421] x 100 = -82.42%
Formula
Percentage change = [(74 - 421) / 421] x 100
Subtract the new number by the original number
74 - 421 = -347
-347 ÷ 421 = -0.8242280285035629
-0.8242280285035629 x 100 = -82.42%