Add 72/10 and 5/21
1st number: 7 2/10, 2nd number: 5/21
72/10 + 5/21 is 781/105.
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,
5/21 = 5 × 10/21 × 10 = 50/210 - Add the two like fractions:
1512/210 + 50/210 = 1512 + 50/210 = 1562/210 - 1562/210 simplified gives 781/105
- So, 72/10 + 5/21 = 781/105
In mixed form: 746/105
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