Answers

Add 21/30 and 90/56

1^st number: 21/30, 2^nd number: 1 34/56

21/30 + 90/56 is 323/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 56 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 30 × 28 = 840,
   21/30 = 21 × 28/30 × 28 = 588/840
3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
   90/56 = 90 × 15/56 × 15 = 1350/840
4. Add the two like fractions:
   588/840 + 1350/840 = 588 + 1350/840 = 1938/840
5. 1938/840 simplified gives 323/140
6. So, 21/30 + 90/56 = 323/140
   In mixed form: 243/140

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