Answers

Add 64/21 and 98/20

1^st number: 3 1/21, 2^nd number: 4 18/20

64/21 + 98/20 is 1669/210.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 21 × 20 = 420,
   64/21 = 64 × 20/21 × 20 = 1280/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   98/20 = 98 × 21/20 × 21 = 2058/420
4. Add the two like fractions:
   1280/420 + 2058/420 = 1280 + 2058/420 = 3338/420
5. 3338/420 simplified gives 1669/210
6. So, 64/21 + 98/20 = 1669/210
   In mixed form: 7199/210

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