Answers

Add 35/28 and 80/20

1^st number: 1 7/28, 2^nd number: 4 0/20

35/28 + 80/20 is 21/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 28 × 5 = 140,
   35/28 = 35 × 5/28 × 5 = 175/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   80/20 = 80 × 7/20 × 7 = 560/140
4. Add the two like fractions:
   175/140 + 560/140 = 175 + 560/140 = 735/140
5. 735/140 simplified gives 21/4
6. So, 35/28 + 80/20 = 21/4
   In mixed form: 51/4

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