Answers

Add 56/21 and 20/45

1^st number: 2 14/21, 2^nd number: 20/45

56/21 + 20/45 is 28/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 45 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 21 × 15 = 315,
   56/21 = 56 × 15/21 × 15 = 840/315
3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
   20/45 = 20 × 7/45 × 7 = 140/315
4. Add the two like fractions:
   840/315 + 140/315 = 840 + 140/315 = 980/315
5. 980/315 simplified gives 28/9
6. So, 56/21 + 20/45 = 28/9
   In mixed form: 31/9

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