Answers

Subtract 21/15 from 7/27

1^st number: 7/27, 2^nd number: 1 6/15

7/27 - 21/15 is -154/135.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 15 is 135
   
   Next, find the equivalent fraction of both fractional numbers with denominator 135
2. For the 1st fraction, since 27 × 5 = 135,
   7/27 = 7 × 5/27 × 5 = 35/135
3. Likewise, for the 2nd fraction, since 15 × 9 = 135,
   21/15 = 21 × 9/15 × 9 = 189/135
4. Subtract the two like fractions:
   35/135 - 189/135 = 35 - 189/135 = -154/135

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