Answers

Add 90/70 and 70/4

1^st number: 1 20/70, 2^nd number: 17 2/4

90/70 + 70/4 is 263/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 4 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 70 × 2 = 140,
   90/70 = 90 × 2/70 × 2 = 180/140
3. Likewise, for the 2nd fraction, since 4 × 35 = 140,
   70/4 = 70 × 35/4 × 35 = 2450/140
4. Add the two like fractions:
   180/140 + 2450/140 = 180 + 2450/140 = 2630/140
5. 2630/140 simplified gives 263/14
6. So, 90/70 + 70/4 = 263/14
   In mixed form: 1811/14

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