Answers

Subtract 81/24 from 84/90

1^st number: 84/90, 2^nd number: 3 9/24

84/90 - 81/24 is -293/120.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 24 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 90 × 4 = 360,
   84/90 = 84 × 4/90 × 4 = 336/360
3. Likewise, for the 2nd fraction, since 24 × 15 = 360,
   81/24 = 81 × 15/24 × 15 = 1215/360
4. Subtract the two like fractions:
   336/360 - 1215/360 = 336 - 1215/360 = -879/360
5. After reducing the fraction, the answer is -293/120

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