Answers

Add 28/20 and 54/42

1^st number: 1 8/20, 2^nd number: 1 12/42

28/20 + 54/42 is 94/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 42 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   28/20 = 28 × 21/20 × 21 = 588/420
3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
   54/42 = 54 × 10/42 × 10 = 540/420
4. Add the two like fractions:
   588/420 + 540/420 = 588 + 540/420 = 1128/420
5. 1128/420 simplified gives 94/35
6. So, 28/20 + 54/42 = 94/35
   In mixed form: 224/35

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