Answers

Subtract 9/40 from 20/12

1^st number: 1 8/12, 2^nd number: 9/40

20/12 - 9/40 is 173/120.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 12 × 10 = 120,
   20/12 = 20 × 10/12 × 10 = 200/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   9/40 = 9 × 3/40 × 3 = 27/120
4. Subtract the two like fractions:
   200/120 - 27/120 = 200 - 27/120 = 173/120
5. In mixed form: 153/120

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