Answers

Add 25/21 and 90/42

1^st number: 1 4/21, 2^nd number: 2 6/42

25/21 + 90/42 is 10/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 42 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 21 × 2 = 42,
   25/21 = 25 × 2/21 × 2 = 50/42
3. Likewise, for the 2nd fraction, since 42 × 1 = 42,
   90/42 = 90 × 1/42 × 1 = 90/42
4. Add the two like fractions:
   50/42 + 90/42 = 50 + 90/42 = 140/42
5. 140/42 simplified gives 10/3
6. So, 25/21 + 90/42 = 10/3
   In mixed form: 31/3

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