Add 72/21 and 16/18
1st number: 3 9/21, 2nd number: 16/18
72/21 + 16/18 is 272/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
72/21 = 72 × 6/21 × 6 = 432/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
16/18 = 16 × 7/18 × 7 = 112/126 - Add the two like fractions:
432/126 + 112/126 = 432 + 112/126 = 544/126 - 544/126 simplified gives 272/63
- So, 72/21 + 16/18 = 272/63
In mixed form: 420/63
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