-13.5% is the change from 511 to 442
Calculation steps:
[( 442 - 511 ) ÷ 511] x 100 = -13.5%
Formula
Percentage change = [(442 - 511) / 511] x 100
Subtract the new number by the original number
442 - 511 = -69
-69 ÷ 511 = -0.1350293542074364
-0.1350293542074364 x 100 = -13.5%