Answers

Add 54/28 and 42/90

1^st number: 1 26/28, 2^nd number: 42/90

54/28 + 42/90 is 503/210.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 90 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 28 × 45 = 1260,
   54/28 = 54 × 45/28 × 45 = 2430/1260
3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
   42/90 = 42 × 14/90 × 14 = 588/1260
4. Add the two like fractions:
   2430/1260 + 588/1260 = 2430 + 588/1260 = 3018/1260
5. 3018/1260 simplified gives 503/210
6. So, 54/28 + 42/90 = 503/210
   In mixed form: 283/210

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