Answers

Add 21/70 and 90/75

1^st number: 21/70, 2^nd number: 1 15/75

21/70 + 90/75 is 3/2.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 75 is 1050
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1050
2. For the 1st fraction, since 70 × 15 = 1050,
   21/70 = 21 × 15/70 × 15 = 315/1050
3. Likewise, for the 2nd fraction, since 75 × 14 = 1050,
   90/75 = 90 × 14/75 × 14 = 1260/1050
4. Add the two like fractions:
   315/1050 + 1260/1050 = 315 + 1260/1050 = 1575/1050
5. 1575/1050 simplified gives 3/2
6. So, 21/70 + 90/75 = 3/2
   In mixed form: 11/2

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