Answers

Subtract 42/63 from 28/45

28/45 - 42/63 is -2/45.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 63 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 45 × 7 = 315,
   28/45 = 28 × 7/45 × 7 = 196/315
3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
   42/63 = 42 × 5/63 × 5 = 210/315
4. Subtract the two like fractions:
   196/315 - 210/315 = 196 - 210/315 = -14/315
5. After reducing the fraction, the answer is -2/45

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