Answers

Add 10/21 and 7/90

10/21 + 7/90 is 349/630.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 21 × 30 = 630,
   10/21 = 10 × 30/21 × 30 = 300/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   7/90 = 7 × 7/90 × 7 = 49/630
4. Add the two like fractions:
   300/630 + 49/630 = 300 + 49/630 = 349/630
5. So, 10/21 + 7/90 = 349/630

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