Add 81/21 and 5/30
1st number: 3 18/21, 2nd number: 5/30
81/21 + 5/30 is 169/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
81/21 = 81 × 10/21 × 10 = 810/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
5/30 = 5 × 7/30 × 7 = 35/210 - Add the two like fractions:
810/210 + 35/210 = 810 + 35/210 = 845/210 - 845/210 simplified gives 169/42
- So, 81/21 + 5/30 = 169/42
In mixed form: 41/42
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