Answers

Add 21/28 and 75/40

1^st number: 21/28, 2^nd number: 1 35/40

21/28 + 75/40 is 21/8.

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,
   75/40 = 75 × 7/40 × 7 = 525/280
4. Add the two like fractions:
   210/280 + 525/280 = 210 + 525/280 = 735/280
5. 735/280 simplified gives 21/8
6. So, 21/28 + 75/40 = 21/8
   In mixed form: 25/8

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