Add 4/21 and 16/18
4/21 + 16/18 is 68/63.
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,
4/21 = 4 × 6/21 × 6 = 24/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
16/18 = 16 × 7/18 × 7 = 112/126 - Add the two like fractions:
24/126 + 112/126 = 24 + 112/126 = 136/126 - 136/126 simplified gives 68/63
- So, 4/21 + 16/18 = 68/63
In mixed form: 15/63
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