<p>First, convert all grades from 100 point scale into letter grades. Then do the calculation using A=4, B=3, etc. Your formula would only work if A=100, B=80, C=60, D=40.</p>
<p>First, convert all grades from 100 point scale into letter grades. Then do the calculation using A=4, B=3, etc. Your formula would only work if A=100, B=80, C=60, D=40.</p>