-89.31% is the change from 421 to 45
Calculation steps:
[( 45 - 421 ) ÷ 421] x 100 = -89.31%
Formula
Percentage change = [(45 - 421) / 421] x 100
Subtract the new number by the original number
45 - 421 = -376
-376 ÷ 421 = -0.8931116389548693
-0.8931116389548693 x 100 = -89.31%