Add 72/6 and 70/21
1st number: 12 0/6, 2nd number: 3 7/21
72/6 + 70/21 is 46/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
72/6 = 72 × 7/6 × 7 = 504/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
70/21 = 70 × 2/21 × 2 = 140/42 - Add the two like fractions:
504/42 + 140/42 = 504 + 140/42 = 644/42 - 644/42 simplified gives 46/3
- So, 72/6 + 70/21 = 46/3
In mixed form: 151/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12+70/21 72/6+70/42 72/18+70/21 72/6+70/63 72/30+70/21 72/42+70/21