Answers

Add 40/28 and 21/35

1^st number: 1 12/28, 2^nd number: 21/35

40/28 + 21/35 is 71/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 35 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 28 × 5 = 140,
   40/28 = 40 × 5/28 × 5 = 200/140
3. Likewise, for the 2nd fraction, since 35 × 4 = 140,
   21/35 = 21 × 4/35 × 4 = 84/140
4. Add the two like fractions:
   200/140 + 84/140 = 200 + 84/140 = 284/140
5. 284/140 simplified gives 71/35
6. So, 40/28 + 21/35 = 71/35
   In mixed form: 21/35

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