Answers

Add 70/20 and 21/70

1^st number: 3 10/20, 2^nd number: 21/70

70/20 + 21/70 is 19/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 70 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   70/20 = 70 × 7/20 × 7 = 490/140
3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
   21/70 = 21 × 2/70 × 2 = 42/140
4. Add the two like fractions:
   490/140 + 42/140 = 490 + 42/140 = 532/140
5. 532/140 simplified gives 19/5
6. So, 70/20 + 21/70 = 19/5
   In mixed form: 34/5

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