-85.61% is the change from 549 to 79
Calculation steps:
[( 79 - 549 ) ÷ 549] x 100 = -85.61%
Formula
Percentage change = [(79 - 549) / 549] x 100
Subtract the new number by the original number
79 - 549 = -470
-470 ÷ 549 = -0.8561020036429873
-0.8561020036429873 x 100 = -85.61%