Answers

Add 90/45 and 75/70

1^st number: 2 0/45, 2^nd number: 1 5/70

90/45 + 75/70 is 43/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 70 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 45 × 14 = 630,
   90/45 = 90 × 14/45 × 14 = 1260/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   75/70 = 75 × 9/70 × 9 = 675/630
4. Add the two like fractions:
   1260/630 + 675/630 = 1260 + 675/630 = 1935/630
5. 1935/630 simplified gives 43/14
6. So, 90/45 + 75/70 = 43/14
   In mixed form: 31/14

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