Add 15/40 and 9/10
15/40 + 9/10 is 51/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
15/40 = 15 × 1/40 × 1 = 15/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
9/10 = 9 × 4/10 × 4 = 36/40 - Add the two like fractions:
15/40 + 36/40 = 15 + 36/40 = 51/40 - So, 15/40 + 9/10 = 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: 30/40+9/10 15/40+18/10 15/80+9/10 15/40+9/20 45/40+9/10 15/40+27/10 15/40+9/30 75/40+9/10 15/40+45/10 15/40+9/50 15/40+63/10 15/40+9/70