Add 21/63 and 12/30
21/63 + 12/30 is 11/15.
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,
21/63 = 21 × 10/63 × 10 = 210/630 - Likewise, for the 2nd fraction, since 30 × 21 = 630,
12/30 = 12 × 21/30 × 21 = 252/630 - Add the two like fractions:
210/630 + 252/630 = 210 + 252/630 = 462/630 - 462/630 simplified gives 11/15
- So, 21/63 + 12/30 = 11/15
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