-70.95% is the change from 420 to 122
Calculation steps:
[( 122 - 420 ) ÷ 420] x 100 = -70.95%
Formula
Percentage change = [(122 - 420) / 420] x 100
Subtract the new number by the original number
122 - 420 = -298
-298 ÷ 420 = -0.7095238095238096
-0.7095238095238096 x 100 = -70.95%