Answers

Add 90/20 and 5/70

1^st number: 4 10/20, 2^nd number: 5/70

90/20 + 5/70 is 32/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 70 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   90/20 = 90 × 7/20 × 7 = 630/140
3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
   5/70 = 5 × 2/70 × 2 = 10/140
4. Add the two like fractions:
   630/140 + 10/140 = 630 + 10/140 = 640/140
5. 640/140 simplified gives 32/7
6. So, 90/20 + 5/70 = 32/7
   In mixed form: 44/7

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