Add 54/15 and 20/70
1st number: 3 9/15, 2nd number: 20/70
54/15 + 20/70 is 136/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
54/15 = 54 × 14/15 × 14 = 756/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
20/70 = 20 × 3/70 × 3 = 60/210 - Add the two like fractions:
756/210 + 60/210 = 756 + 60/210 = 816/210 - 816/210 simplified gives 136/35
- So, 54/15 + 20/70 = 136/35
In mixed form: 331/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15+40/70 54/30+20/70 54/15+60/70 54/45+20/70 54/75+20/70