Add 9/15 and 27/40
9/15 + 27/40 is 51/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
9/15 = 9 × 8/15 × 8 = 72/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
27/40 = 27 × 3/40 × 3 = 81/120 - Add the two like fractions:
72/120 + 81/120 = 72 + 81/120 = 153/120 - 153/120 simplified gives 51/40
- So, 9/15 + 27/40 = 51/40
In mixed form: 111/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+27/40 9/15+54/40 9/30+27/40 9/15+27/80 27/15+27/40 9/15+81/40 9/45+27/40 45/15+27/40 9/75+27/40 63/15+27/40