Answers

Add 21/70 and 63/20

1^st number: 21/70, 2^nd number: 3 3/20

21/70 + 63/20 is 69/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 70 × 2 = 140,
   21/70 = 21 × 2/70 × 2 = 42/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   63/20 = 63 × 7/20 × 7 = 441/140
4. Add the two like fractions:
   42/140 + 441/140 = 42 + 441/140 = 483/140
5. 483/140 simplified gives 69/20
6. So, 21/70 + 63/20 = 69/20
   In mixed form: 39/20

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