A stock bottle of medication contains 500 mg of drug used in

A stock bottle of medication contains 500 mg of drug used in compounding other medications. You used 125 mg for one prescription and 62.5 mg for a second prescription, while the third prescription was for a child and only 25.25 mg were necessary.

What quantity medication has been used? __________

What quantity of the original medication is left? __________

Solution

total amount contained= 500mg

used amount= 62.5+125+25.25 = 212.75mg

amount left = 500-212.75 = 287.25mg