In marking goods bought by the dozen to make a specific per cent of profit, the following will be of assistance:

To make 12 1/2 per cent, remove the decimal point and add one-sixteenth.

To make 16% per cent, remove the decimal point and add one-thirty-sixth.

To make 18% per cent, remove the decimal point and add one-ninety-sixth.

To make 20 per cent, remove the decimal point one place to the left.

To make 25 per cent, remove the decimal point and add one-twenty-fourth.

To make 26 per cent, remove the decimal point and add one-twenty-sixth.

To make 28 per cent, remove the decimal point and add one-fifteenth.

To make 30 per cent, remove the decimal point and add one-twelfth.

To make 32 per cent, remove the decimal point and add one-tenth.

To make 33 1/3 per cent, remove the decimal point and add one-ninth.

To make 35 per cent, remove the decimal point and add one-eighth.

To make 37 1/2 per cent, remove the decimal point and add one-seventh.

To make 40 per cent, remove the decimal point and add one-sixth.

To make 44 per cent, remove the decimal point and add one-fifth.

To make 50 per cent, remove the decimal point and add one-fourth.

To make 60 per cent, remove the decimal point and add one-third.

To make 80 per cent, remove the decimal point and add one-half.