Answers

Add 35/63 and 21/70

35/63 + 21/70 is 77/90.

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,
   35/63 = 35 × 10/63 × 10 = 350/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   21/70 = 21 × 9/70 × 9 = 189/630
4. Add the two like fractions:
   350/630 + 189/630 = 350 + 189/630 = 539/630
5. 539/630 simplified gives 77/90
6. So, 35/63 + 21/70 = 77/90

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