Answers

Subtract 3/70 from 20/18

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

20/18 - 3/70 is 673/630.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 70 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 18 × 35 = 630,
   20/18 = 20 × 35/18 × 35 = 700/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   3/70 = 3 × 9/70 × 9 = 27/630
4. Subtract the two like fractions:
   700/630 - 27/630 = 700 - 27/630 = 673/630
5. In mixed form: 143/630

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