-49.05% is the change from 420 to 214
Calculation steps:
[( 214 - 420 ) ÷ 420] x 100 = -49.05%
Formula
Percentage change = [(214 - 420) / 420] x 100
Subtract the new number by the original number
214 - 420 = -206
-206 ÷ 420 = -0.49047619047619045
-0.49047619047619045 x 100 = -49.05%