Answers

Subtract 40/42 from 27/30

27/30 - 40/42 is -11/210.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 42 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 30 × 7 = 210,
   27/30 = 27 × 7/30 × 7 = 189/210
3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
   40/42 = 40 × 5/42 × 5 = 200/210
4. Subtract the two like fractions:
   189/210 - 200/210 = 189 - 200/210 = -11/210

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