-98.18% is the change from 549 to 10
Calculation steps:
[( 10 - 549 ) ÷ 549] x 100 = -98.18%
Formula
Percentage change = [(10 - 549) / 549] x 100
Subtract the new number by the original number
10 - 549 = -539
-539 ÷ 549 = -0.9817850637522769
-0.9817850637522769 x 100 = -98.18%