Answers

Add 70/21 and 90/4

1^st number: 3 7/21, 2^nd number: 22 2/4

70/21 + 90/4 is 155/6.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   70/21 = 70 × 4/21 × 4 = 280/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   90/4 = 90 × 21/4 × 21 = 1890/84
4. Add the two like fractions:
   280/84 + 1890/84 = 280 + 1890/84 = 2170/84
5. 2170/84 simplified gives 155/6
6. So, 70/21 + 90/4 = 155/6
   In mixed form: 255/6

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