Add 18/9 and 25/21
1st number: 2 0/9, 2nd number: 1 4/21
18/9 + 25/21 is 67/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
18/9 = 18 × 7/9 × 7 = 126/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
25/21 = 25 × 3/21 × 3 = 75/63 - Add the two like fractions:
126/63 + 75/63 = 126 + 75/63 = 201/63 - 201/63 simplified gives 67/21
- So, 18/9 + 25/21 = 67/21
In mixed form: 34/21
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