Answers

Subtract 35/72 from 18/21

18/21 - 35/72 is 187/504.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 21 × 24 = 504,
   18/21 = 18 × 24/21 × 24 = 432/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   35/72 = 35 × 7/72 × 7 = 245/504
4. Subtract the two like fractions:
   432/504 - 245/504 = 432 - 245/504 = 187/504

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