Answers

Subtract 21/90 from 90/75

1^st number: 1 15/75, 2^nd number: 21/90

90/75 - 21/90 is 29/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 90 is 450
   
   Next, find the equivalent fraction of both fractional numbers with denominator 450
2. For the 1st fraction, since 75 × 6 = 450,
   90/75 = 90 × 6/75 × 6 = 540/450
3. Likewise, for the 2nd fraction, since 90 × 5 = 450,
   21/90 = 21 × 5/90 × 5 = 105/450
4. Subtract the two like fractions:
   540/450 - 105/450 = 540 - 105/450 = 435/450
5. After reducing the fraction, the answer is 29/30

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