Answers

Subtract 9/20 from 9/7

1^st number: 1 2/7, 2^nd number: 9/20

9/7 - 9/20 is 117/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 7 × 20 = 140,
   9/7 = 9 × 20/7 × 20 = 180/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   9/20 = 9 × 7/20 × 7 = 63/140
4. Subtract the two like fractions:
   180/140 - 63/140 = 180 - 63/140 = 117/140

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