-80.2% is the change from 803 to 159
Calculation steps:
[( 159 - 803 ) ÷ 803] x 100 = -80.2%
Formula
Percentage change = [(159 - 803) / 803] x 100
Subtract the new number by the original number
159 - 803 = -644
-644 ÷ 803 = -0.8019925280199253
-0.8019925280199253 x 100 = -80.2%