Add 42/15 and 54/30
1st number: 2 12/15, 2nd number: 1 24/30
42/15 + 54/30 is 23/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
42/15 = 42 × 2/15 × 2 = 84/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
54/30 = 54 × 1/30 × 1 = 54/30 - Add the two like fractions:
84/30 + 54/30 = 84 + 54/30 = 138/30 - 138/30 simplified gives 23/5
- So, 42/15 + 54/30 = 23/5
In mixed form: 43/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15+54/30 42/30+54/30 42/15+54/60 42/45+54/30 42/15+54/90 42/75+54/30