Answers

Subtract 21/16 from 7/15

1^st number: 7/15, 2^nd number: 1 5/16

7/15 - 21/16 is -203/240.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 16 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 15 × 16 = 240,
   7/15 = 7 × 16/15 × 16 = 112/240
3. Likewise, for the 2nd fraction, since 16 × 15 = 240,
   21/16 = 21 × 15/16 × 15 = 315/240
4. Subtract the two like fractions:
   112/240 - 315/240 = 112 - 315/240 = -203/240

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