Add 81/30 and 18/63
1st number: 2 21/30, 2nd number: 18/63
81/30 + 18/63 is 209/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
81/30 = 81 × 21/30 × 21 = 1701/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
18/63 = 18 × 10/63 × 10 = 180/630 - Add the two like fractions:
1701/630 + 180/630 = 1701 + 180/630 = 1881/630 - 1881/630 simplified gives 209/70
- So, 81/30 + 18/63 = 209/70
In mixed form: 269/70
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