Answers

Add 5/21 and 90/45

1^st number: 5/21, 2^nd number: 2 0/45

5/21 + 90/45 is 47/21.

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,
   5/21 = 5 × 15/21 × 15 = 75/315
3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
   90/45 = 90 × 7/45 × 7 = 630/315
4. Add the two like fractions:
   75/315 + 630/315 = 75 + 630/315 = 705/315
5. 705/315 simplified gives 47/21
6. So, 5/21 + 90/45 = 47/21
   In mixed form: 25/21

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