-87.07% is the change from 549 to 71
Calculation steps:
[( 71 - 549 ) ÷ 549] x 100 = -87.07%
Formula
Percentage change = [(71 - 549) / 549] x 100
Subtract the new number by the original number
71 - 549 = -478
-478 ÷ 549 = -0.8706739526411658
-0.8706739526411658 x 100 = -87.07%