Add 15/63 and 20/70
15/63 + 20/70 is 11/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
15/63 = 15 × 10/63 × 10 = 150/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 180/630 - Add the two like fractions:
150/630 + 180/630 = 150 + 180/630 = 330/630 - 330/630 simplified gives 11/21
- So, 15/63 + 20/70 = 11/21
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