Answers

Add 21/28 and 70/40

1^st number: 21/28, 2^nd number: 1 30/40

21/28 + 70/40 is 5/2.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 28 × 10 = 280,
   21/28 = 21 × 10/28 × 10 = 210/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   70/40 = 70 × 7/40 × 7 = 490/280
4. Add the two like fractions:
   210/280 + 490/280 = 210 + 490/280 = 700/280
5. 700/280 simplified gives 5/2
6. So, 21/28 + 70/40 = 5/2
   In mixed form: 21/2

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