Add 70/18 and 7/21
1st number: 3 16/18, 2nd number: 7/21
70/18 + 7/21 is 38/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
7/21 = 7 × 6/21 × 6 = 42/126 - Add the two like fractions:
490/126 + 42/126 = 490 + 42/126 = 532/126 - 532/126 simplified gives 38/9
- So, 70/18 + 7/21 = 38/9
In mixed form: 42/9
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