Add 72/10 and 27/21
1st number: 7 2/10, 2nd number: 1 6/21
72/10 + 27/21 is 297/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
72/10 = 72 × 21/10 × 21 = 1512/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
27/21 = 27 × 10/21 × 10 = 270/210 - Add the two like fractions:
1512/210 + 270/210 = 1512 + 270/210 = 1782/210 - 1782/210 simplified gives 297/35
- So, 72/10 + 27/21 = 297/35
In mixed form: 817/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/10+54/21 72/20+27/21 72/10+27/42 72/10+81/21 72/30+27/21 72/10+27/63 72/50+27/21 72/70+27/21