Add 28/63 and 21/30
28/63 + 21/30 is 103/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 30 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
28/63 = 28 × 10/63 × 10 = 280/630 - Likewise, for the 2nd fraction, since 30 × 21 = 630,
21/30 = 21 × 21/30 × 21 = 441/630 - Add the two like fractions:
280/630 + 441/630 = 280 + 441/630 = 721/630 - 721/630 simplified gives 103/90
- So, 28/63 + 21/30 = 103/90
In mixed form: 113/90
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