-1.66% is the change from 543 to 534
Calculation steps:
[( 534 - 543 ) ÷ 543] x 100 = -1.66%
Formula
Percentage change = [(534 - 543) / 543] x 100
Subtract the new number by the original number
534 - 543 = -9
-9 ÷ 543 = -0.016574585635359115
-0.016574585635359115 x 100 = -1.66%