Answers

Add 21/98 and 70/72

21/98 + 70/72 is 299/252.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 72 is 3528
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3528
2. For the 1st fraction, since 98 × 36 = 3528,
   21/98 = 21 × 36/98 × 36 = 756/3528
3. Likewise, for the 2nd fraction, since 72 × 49 = 3528,
   70/72 = 70 × 49/72 × 49 = 3430/3528
4. Add the two like fractions:
   756/3528 + 3430/3528 = 756 + 3430/3528 = 4186/3528
5. 4186/3528 simplified gives 299/252
6. So, 21/98 + 70/72 = 299/252
   In mixed form: 147/252

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