Add 21/30 and 90/63
1st number: 21/30, 2nd number: 1 27/63
21/30 + 90/63 is 149/70.
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,
21/30 = 21 × 21/30 × 21 = 441/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
90/63 = 90 × 10/63 × 10 = 900/630 - Add the two like fractions:
441/630 + 900/630 = 441 + 900/630 = 1341/630 - 1341/630 simplified gives 149/70
- So, 21/30 + 90/63 = 149/70
In mixed form: 29/70
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