Answers

Add 27/63 and 21/70

27/63 + 21/70 is 51/70.

Steps for adding fractions

1. 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
2. For the 1st fraction, since 63 × 10 = 630,
   27/63 = 27 × 10/63 × 10 = 270/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   21/70 = 21 × 9/70 × 9 = 189/630
4. Add the two like fractions:
   270/630 + 189/630 = 270 + 189/630 = 459/630
5. 459/630 simplified gives 51/70
6. So, 27/63 + 21/70 = 51/70

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