Answers

Subtract 81/84 from 42/60

42/60 - 81/84 is -37/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 60 × 7 = 420,
   42/60 = 42 × 7/60 × 7 = 294/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   81/84 = 81 × 5/84 × 5 = 405/420
4. Subtract the two like fractions:
   294/420 - 405/420 = 294 - 405/420 = -111/420
5. After reducing the fraction, the answer is -37/140

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