Answers

Subtract 45/63 from 49/72

49/72 - 45/63 is -17/504.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 63 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   49/72 = 49 × 7/72 × 7 = 343/504
3. Likewise, for the 2nd fraction, since 63 × 8 = 504,
   45/63 = 45 × 8/63 × 8 = 360/504
4. Subtract the two like fractions:
   343/504 - 360/504 = 343 - 360/504 = -17/504

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