Add 30/40 and 6/15
30/40 + 6/15 is 23/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
30/40 = 30 × 3/40 × 3 = 90/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
6/15 = 6 × 8/15 × 8 = 48/120 - Add the two like fractions:
90/120 + 48/120 = 90 + 48/120 = 138/120 - 138/120 simplified gives 23/20
- So, 30/40 + 6/15 = 23/20
In mixed form: 13/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+6/15 30/40+12/15 30/80+6/15 30/40+6/30 90/40+6/15 30/40+18/15 30/40+6/45 30/40+30/15 30/40+6/75 30/40+42/15