-96.77% is the change from 557 to 18
Calculation steps:
[( 18 - 557 ) ÷ 557] x 100 = -96.77%
Formula
Percentage change = [(18 - 557) / 557] x 100
Subtract the new number by the original number
18 - 557 = -539
-539 ÷ 557 = -0.9676840215439856
-0.9676840215439856 x 100 = -96.77%