-21.16% is the change from 534 to 421
Calculation steps:
[( 421 - 534 ) ÷ 534] x 100 = -21.16%
Formula
Percentage change = [(421 - 534) / 534] x 100
Subtract the new number by the original number
421 - 534 = -113
-113 ÷ 534 = -0.21161048689138576
-0.21161048689138576 x 100 = -21.16%