Answers

Add 21/28 and 63/40

1^st number: 21/28, 2^nd number: 1 23/40

21/28 + 63/40 is 93/40.

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,
   63/40 = 63 × 7/40 × 7 = 441/280
4. Add the two like fractions:
   210/280 + 441/280 = 210 + 441/280 = 651/280
5. 651/280 simplified gives 93/40
6. So, 21/28 + 63/40 = 93/40
   In mixed form: 213/40

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