Add 20/12 and 72/56
1st number: 1 8/12, 2nd number: 1 16/56
20/12 + 72/56 is 62/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 12 × 14 = 168,
20/12 = 20 × 14/12 × 14 = 280/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
72/56 = 72 × 3/56 × 3 = 216/168 - Add the two like fractions:
280/168 + 216/168 = 280 + 216/168 = 496/168 - 496/168 simplified gives 62/21
- So, 20/12 + 72/56 = 62/21
In mixed form: 220/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/12+72/56 20/24+72/56 60/12+72/56 20/36+72/56 20/60+72/56 20/84+72/56