Answers

Add 48/40 and 21/70

1^st number: 1 8/40, 2^nd number: 21/70

48/40 + 21/70 is 3/2.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 70 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 40 × 7 = 280,
   48/40 = 48 × 7/40 × 7 = 336/280
3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
   21/70 = 21 × 4/70 × 4 = 84/280
4. Add the two like fractions:
   336/280 + 84/280 = 336 + 84/280 = 420/280
5. 420/280 simplified gives 3/2
6. So, 48/40 + 21/70 = 3/2
   In mixed form: 11/2

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