Answers

Subtract 28/40 from 42/64

42/64 - 28/40 is -7/160.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 40 is 320
   
   Next, find the equivalent fraction of both fractional numbers with denominator 320
2. For the 1st fraction, since 64 × 5 = 320,
   42/64 = 42 × 5/64 × 5 = 210/320
3. Likewise, for the 2nd fraction, since 40 × 8 = 320,
   28/40 = 28 × 8/40 × 8 = 224/320
4. Subtract the two like fractions:
   210/320 - 224/320 = 210 - 224/320 = -14/320
5. After reducing the fraction, the answer is -7/160

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