-13.82% is the change from 521 to 449
Calculation steps:
[( 449 - 521 ) ÷ 521] x 100 = -13.82%
Formula
Percentage change = [(449 - 521) / 521] x 100
Subtract the new number by the original number
449 - 521 = -72
-72 ÷ 521 = -0.1381957773512476
-0.1381957773512476 x 100 = -13.82%