Answers

Add 90/70 and 90/3

1^st number: 1 20/70, 2^nd number: 30 0/3

90/70 + 90/3 is 219/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 3 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 70 × 3 = 210,
   90/70 = 90 × 3/70 × 3 = 270/210
3. Likewise, for the 2nd fraction, since 3 × 70 = 210,
   90/3 = 90 × 70/3 × 70 = 6300/210
4. Add the two like fractions:
   270/210 + 6300/210 = 270 + 6300/210 = 6570/210
5. 6570/210 simplified gives 219/7
6. So, 90/70 + 90/3 = 219/7
   In mixed form: 312/7

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