Hey there!!
In order to find the amount saved, we will need to find the 12% of $865.00 and subtract it from $865.00
12 % = 12 / 100 = 0.12
0.12 × 865
$103.80
This is the amount saved
The amount will have to be paid = $850.00 - $103.80
... $746.20
Hope my answer helps!