Add 90/14 and 81/21
1st number: 6 6/14, 2nd number: 3 18/21
90/14 + 81/21 is 72/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
90/14 = 90 × 3/14 × 3 = 270/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
81/21 = 81 × 2/21 × 2 = 162/42 - Add the two like fractions:
270/42 + 162/42 = 270 + 162/42 = 432/42 - 432/42 simplified gives 72/7
- So, 90/14 + 81/21 = 72/7
In mixed form: 102/7
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