To reduce a whole number and a fraction, as 4-1/2, to fractional form, multiply the whole number by the denominator, add the numerator and write the result over the denominator. Thus, 4 X 2 = 8 + = 9 placed over 2 is 9/2.
TO ADD FRACTIONS.
Reduce the fractions to like denominators, add their numerators and write the denominator under the result.
Example. Add 2/3 to 3/4.
2/3 = 8/12, 3/4 = 9/12, 8/12 + 9/12 = 17/12 = 1-5/12. Ans.
TO SUBTRACT FRACTIONS.
Reduce the fractions to like denominators, subtract the numerators and write the denominators under the result.
Example. Find the difference between 4/5 and 3/4.
4/5 = 16/20, 3/4 = 15/20, 16/20 - 15/20 = 1/20. Ans.