Answers

Add 72/70 and 63/18

1^st number: 1 2/70, 2^nd number: 3 9/18

72/70 + 63/18 is 317/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 18 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   72/70 = 72 × 9/70 × 9 = 648/630
3. Likewise, for the 2nd fraction, since 18 × 35 = 630,
   63/18 = 63 × 35/18 × 35 = 2205/630
4. Add the two like fractions:
   648/630 + 2205/630 = 648 + 2205/630 = 2853/630
5. 2853/630 simplified gives 317/70
6. So, 72/70 + 63/18 = 317/70
   In mixed form: 437/70

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