-12.86% is the change from 630 to 549
Calculation steps:
[( 549 - 630 ) ÷ 630] x 100 = -12.86%
Formula
Percentage change = [(549 - 630) / 630] x 100
Subtract the new number by the original number
549 - 630 = -81
-81 ÷ 630 = -0.12857142857142856
-0.12857142857142856 x 100 = -12.86%