-30.07% is the change from 602 to 421
Calculation steps:
[( 421 - 602 ) ÷ 602] x 100 = -30.07%
Formula
Percentage change = [(421 - 602) / 602] x 100
Subtract the new number by the original number
421 - 602 = -181
-181 ÷ 602 = -0.30066445182724255
-0.30066445182724255 x 100 = -30.07%