-43.17% is the change from 549 to 312
Calculation steps:
[( 312 - 549 ) ÷ 549] x 100 = -43.17%
Formula
Percentage change = [(312 - 549) / 549] x 100
Subtract the new number by the original number
312 - 549 = -237
-237 ÷ 549 = -0.43169398907103823
-0.43169398907103823 x 100 = -43.17%