-49.76% is the change from 420 to 211
Calculation steps:
[( 211 - 420 ) ÷ 420] x 100 = -49.76%
Formula
Percentage change = [(211 - 420) / 420] x 100
Subtract the new number by the original number
211 - 420 = -209
-209 ÷ 420 = -0.4976190476190476
-0.4976190476190476 x 100 = -49.76%