-80.88% is the change from 68 to 13
Calculation steps:
[( 13 - 68 ) ÷ 68] x 100 = -80.88%
Formula
Percentage change = [(13 - 68) / 68] x 100
Subtract the new number by the original number
13 - 68 = -55
-55 ÷ 68 = -0.8088235294117647
-0.8088235294117647 x 100 = -80.88%