Add 12/15 and 9/40
12/15 + 9/40 is 41/40.
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,
12/15 = 12 × 8/15 × 8 = 96/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
9/40 = 9 × 3/40 × 3 = 27/120 - Add the two like fractions:
96/120 + 27/120 = 96 + 27/120 = 123/120 - 123/120 simplified gives 41/40
- So, 12/15 + 9/40 = 41/40
In mixed form: 11/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15+9/40 12/15+18/40 12/30+9/40 12/15+9/80 36/15+9/40 12/15+27/40 12/45+9/40 60/15+9/40 12/15+45/40 12/75+9/40 84/15+9/40 12/15+63/40