-93.59% is the change from 421 to 27
Calculation steps:
[( 27 - 421 ) ÷ 421] x 100 = -93.59%
Formula
Percentage change = [(27 - 421) / 421] x 100
Subtract the new number by the original number
27 - 421 = -394
-394 ÷ 421 = -0.9358669833729216
-0.9358669833729216 x 100 = -93.59%