Answers

Add 90/70 and 70/45

1^st number: 1 20/70, 2^nd number: 1 25/45

90/70 + 70/45 is 179/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 45 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   90/70 = 90 × 9/70 × 9 = 810/630
3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
   70/45 = 70 × 14/45 × 14 = 980/630
4. Add the two like fractions:
   810/630 + 980/630 = 810 + 980/630 = 1790/630
5. 1790/630 simplified gives 179/63
6. So, 90/70 + 70/45 = 179/63
   In mixed form: 253/63

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