Answers

Subtract 21/80 from 42/60

42/60 - 21/80 is 7/16.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 60 × 4 = 240,
   42/60 = 42 × 4/60 × 4 = 168/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   21/80 = 21 × 3/80 × 3 = 63/240
4. Subtract the two like fractions:
   168/240 - 63/240 = 168 - 63/240 = 105/240
5. After reducing the fraction, the answer is 7/16

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