Answers

Add 90/28 and 72/45

1^st number: 3 6/28, 2^nd number: 1 27/45

90/28 + 72/45 is 337/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 45 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 28 × 45 = 1260,
   90/28 = 90 × 45/28 × 45 = 4050/1260
3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
   72/45 = 72 × 28/45 × 28 = 2016/1260
4. Add the two like fractions:
   4050/1260 + 2016/1260 = 4050 + 2016/1260 = 6066/1260
5. 6066/1260 simplified gives 337/70
6. So, 90/28 + 72/45 = 337/70
   In mixed form: 457/70

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