Answers

Add 3/45 and 72/70

1^st number: 3/45, 2^nd number: 1 2/70

3/45 + 72/70 is 23/21.

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,
   3/45 = 3 × 14/45 × 14 = 42/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   72/70 = 72 × 9/70 × 9 = 648/630
4. Add the two like fractions:
   42/630 + 648/630 = 42 + 648/630 = 690/630
5. 690/630 simplified gives 23/21
6. So, 3/45 + 72/70 = 23/21
   In mixed form: 12/21

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