-2.21% is the change from 542 to 530
Calculation steps:
[( 530 - 542 ) ÷ 542] x 100 = -2.21%
Formula
Percentage change = [(530 - 542) / 542] x 100
Subtract the new number by the original number
530 - 542 = -12
-12 ÷ 542 = -0.02214022140221402
-0.02214022140221402 x 100 = -2.21%