Answers

Subtract 4/45 from 90/21

1^st number: 4 6/21, 2^nd number: 4/45

90/21 - 4/45 is 1322/315.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 45 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 21 × 15 = 315,
   90/21 = 90 × 15/21 × 15 = 1350/315
3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
   4/45 = 4 × 7/45 × 7 = 28/315
4. Subtract the two like fractions:
   1350/315 - 28/315 = 1350 - 28/315 = 1322/315
5. In mixed form: 462/315

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