-41.09% is the change from 421 to 248
Calculation steps:
[( 248 - 421 ) ÷ 421] x 100 = -41.09%
Formula
Percentage change = [(248 - 421) / 421] x 100
Subtract the new number by the original number
248 - 421 = -173
-173 ÷ 421 = -0.41092636579572445
-0.41092636579572445 x 100 = -41.09%