Answers

Add 90/45 and 4/70

1^st number: 2 0/45, 2^nd number: 4/70

90/45 + 4/70 is 72/35.

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,
   4/70 = 4 × 9/70 × 9 = 36/630
4. Add the two like fractions:
   1260/630 + 36/630 = 1260 + 36/630 = 1296/630
5. 1296/630 simplified gives 72/35
6. So, 90/45 + 4/70 = 72/35
   In mixed form: 22/35

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