Answers

Add 70/84 and 21/98

70/84 + 21/98 is 22/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 98 is 588
   
   Next, find the equivalent fraction of both fractional numbers with denominator 588
2. For the 1st fraction, since 84 × 7 = 588,
   70/84 = 70 × 7/84 × 7 = 490/588
3. Likewise, for the 2nd fraction, since 98 × 6 = 588,
   21/98 = 21 × 6/98 × 6 = 126/588
4. Add the two like fractions:
   490/588 + 126/588 = 490 + 126/588 = 616/588
5. 616/588 simplified gives 22/21
6. So, 70/84 + 21/98 = 22/21
   In mixed form: 11/21

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