-94.38% is the change from 800 to 45
Calculation steps:
[( 45 - 800 ) ÷ 800] x 100 = -94.38%
Formula
Percentage change = [(45 - 800) / 800] x 100
Subtract the new number by the original number
45 - 800 = -755
-755 ÷ 800 = -0.94375
-0.94375 x 100 = -94.38%