Answers

Subtract 7/27 from 90/21

1^st number: 4 6/21, 2^nd number: 7/27

90/21 - 7/27 is 761/189.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 27 is 189
   
   Next, find the equivalent fraction of both fractional numbers with denominator 189
2. For the 1st fraction, since 21 × 9 = 189,
   90/21 = 90 × 9/21 × 9 = 810/189
3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
   7/27 = 7 × 7/27 × 7 = 49/189
4. Subtract the two like fractions:
   810/189 - 49/189 = 810 - 49/189 = 761/189
5. In mixed form: 45/189

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