-21.35% is the change from 534 to 420
Calculation steps:
[( 420 - 534 ) ÷ 534] x 100 = -21.35%
Formula
Percentage change = [(420 - 534) / 534] x 100
Subtract the new number by the original number
420 - 534 = -114
-114 ÷ 534 = -0.21348314606741572
-0.21348314606741572 x 100 = -21.35%