-71.02% is the change from 421 to 122
Calculation steps:
[( 122 - 421 ) ÷ 421] x 100 = -71.02%
Formula
Percentage change = [(122 - 421) / 421] x 100
Subtract the new number by the original number
122 - 421 = -299
-299 ÷ 421 = -0.7102137767220903
-0.7102137767220903 x 100 = -71.02%