Answers

Add 54/21 and 54/90

1^st number: 2 12/21, 2^nd number: 54/90

54/21 + 54/90 is 111/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 21 × 30 = 630,
   54/21 = 54 × 30/21 × 30 = 1620/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   54/90 = 54 × 7/90 × 7 = 378/630
4. Add the two like fractions:
   1620/630 + 378/630 = 1620 + 378/630 = 1998/630
5. 1998/630 simplified gives 111/35
6. So, 54/21 + 54/90 = 111/35
   In mixed form: 36/35

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