Answers

Subtract 9/40 from 15/7

1^st number: 2 1/7, 2^nd number: 9/40

15/7 - 9/40 is 537/280.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 7 × 40 = 280,
   15/7 = 15 × 40/7 × 40 = 600/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   9/40 = 9 × 7/40 × 7 = 63/280
4. Subtract the two like fractions:
   600/280 - 63/280 = 600 - 63/280 = 537/280
5. In mixed form: 1257/280

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