-22.32% is the change from 542 to 421
Calculation steps:
[( 421 - 542 ) ÷ 542] x 100 = -22.32%
Formula
Percentage change = [(421 - 542) / 542] x 100
Subtract the new number by the original number
421 - 542 = -121
-121 ÷ 542 = -0.22324723247232472
-0.22324723247232472 x 100 = -22.32%