Add 72/20 and 36/56
1st number: 3 12/20, 2nd number: 36/56
72/20 + 36/56 is 297/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 20 × 14 = 280,
72/20 = 72 × 14/20 × 14 = 1008/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
36/56 = 36 × 5/56 × 5 = 180/280 - Add the two like fractions:
1008/280 + 180/280 = 1008 + 180/280 = 1188/280 - 1188/280 simplified gives 297/70
- So, 72/20 + 36/56 = 297/70
In mixed form: 417/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+72/56 72/40+36/56 72/60+36/56