-29.51% is the change from 549 to 387
Calculation steps:
[( 387 - 549 ) ÷ 549] x 100 = -29.51%
Formula
Percentage change = [(387 - 549) / 549] x 100
Subtract the new number by the original number
387 - 549 = -162
-162 ÷ 549 = -0.29508196721311475
-0.29508196721311475 x 100 = -29.51%