-96.98% is the change from 596 to 18
Calculation steps:
[( 18 - 596 ) ÷ 596] x 100 = -96.98%
Formula
Percentage change = [(18 - 596) / 596] x 100
Subtract the new number by the original number
18 - 596 = -578
-578 ÷ 596 = -0.9697986577181208
-0.9697986577181208 x 100 = -96.98%