Add 12/56 and 84/20
1st number: 12/56, 2nd number: 4 4/20
12/56 + 84/20 is 309/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 20 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
12/56 = 12 × 5/56 × 5 = 60/280 - Likewise, for the 2nd fraction, since 20 × 14 = 280,
84/20 = 84 × 14/20 × 14 = 1176/280 - Add the two like fractions:
60/280 + 1176/280 = 60 + 1176/280 = 1236/280 - 1236/280 simplified gives 309/70
- So, 12/56 + 84/20 = 309/70
In mixed form: 429/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/56+84/20 12/56+84/40 36/56+84/20 12/56+84/60 60/56+84/20 84/56+84/20