Question 1071988
<pre>
To decrease by 20% is to be multiplied by 100%-20% or 80% or
multiplied by 0.80:

1000×0.80 = 800
800×0.80 = 640
640×0.80 = 512
512×0.80 = 409.6
409.6×0.80 = 327.68
327.68×0.80 = 262.144
262.144×0.80 = 209.7152

Edwin</pre>