Answers

Add 64/21 and 49/60

1^st number: 3 1/21, 2^nd number: 49/60

64/21 + 49/60 is 541/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 60 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 60 × 7 = 420,
   49/60 = 49 × 7/60 × 7 = 343/420
4. Add the two like fractions:
   1280/420 + 343/420 = 1280 + 343/420 = 1623/420
5. 1623/420 simplified gives 541/140
6. So, 64/21 + 49/60 = 541/140
   In mixed form: 3121/140

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