Add 18/9 and 63/21
1st number: 2 0/9, 2nd number: 3 0/21
18/9 + 63/21 is 5/1.
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,
63/21 = 63 × 3/21 × 3 = 189/63 - Add the two like fractions:
126/63 + 189/63 = 126 + 189/63 = 315/63 - 315/63 simplified gives 5/1
- So, 18/9 + 63/21 = 5/1
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