Answers

Subtract 49/72 from 90/21

1^st number: 4 6/21, 2^nd number: 49/72

90/21 - 49/72 is 1817/504.

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,
   90/21 = 90 × 24/21 × 24 = 2160/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   49/72 = 49 × 7/72 × 7 = 343/504
4. Subtract the two like fractions:
   2160/504 - 343/504 = 2160 - 343/504 = 1817/504
5. In mixed form: 3305/504

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