Answers

Subtract 1/72 from 90/84

1^st number: 1 6/84, 2^nd number: 1/72

90/84 - 1/72 is 533/504.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 84 × 6 = 504,
   90/84 = 90 × 6/84 × 6 = 540/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   1/72 = 1 × 7/72 × 7 = 7/504
4. Subtract the two like fractions:
   540/504 - 7/504 = 540 - 7/504 = 533/504
5. In mixed form: 129/504

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