Answers

Add 90/21 and 70/75

1^st number: 4 6/21, 2^nd number: 70/75

90/21 + 70/75 is 548/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 75 is 525
   
   Next, find the equivalent fraction of both fractional numbers with denominator 525
2. For the 1st fraction, since 21 × 25 = 525,
   90/21 = 90 × 25/21 × 25 = 2250/525
3. Likewise, for the 2nd fraction, since 75 × 7 = 525,
   70/75 = 70 × 7/75 × 7 = 490/525
4. Add the two like fractions:
   2250/525 + 490/525 = 2250 + 490/525 = 2740/525
5. 2740/525 simplified gives 548/105
6. So, 90/21 + 70/75 = 548/105
   In mixed form: 523/105

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