Answers

Add 70/20 and 21/64

1^st number: 3 10/20, 2^nd number: 21/64

70/20 + 21/64 is 245/64.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 64 is 320
   
   Next, find the equivalent fraction of both fractional numbers with denominator 320
2. For the 1st fraction, since 20 × 16 = 320,
   70/20 = 70 × 16/20 × 16 = 1120/320
3. Likewise, for the 2nd fraction, since 64 × 5 = 320,
   21/64 = 21 × 5/64 × 5 = 105/320
4. Add the two like fractions:
   1120/320 + 105/320 = 1120 + 105/320 = 1225/320
5. 1225/320 simplified gives 245/64
6. So, 70/20 + 21/64 = 245/64
   In mixed form: 353/64

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