-81.6% is the change from 549 to 101
Calculation steps:
[( 101 - 549 ) ÷ 549] x 100 = -81.6%
Formula
Percentage change = [(101 - 549) / 549] x 100
Subtract the new number by the original number
101 - 549 = -448
-448 ÷ 549 = -0.8160291438979964
-0.8160291438979964 x 100 = -81.6%