-80.05% is the change from 797 to 159
Calculation steps:
[( 159 - 797 ) ÷ 797] x 100 = -80.05%
Formula
Percentage change = [(159 - 797) / 797] x 100
Subtract the new number by the original number
159 - 797 = -638
-638 ÷ 797 = -0.8005018820577164
-0.8005018820577164 x 100 = -80.05%