Answers

Subtract 70/12 from 90/84

1^st number: 1 6/84, 2^nd number: 5 10/12

90/84 - 70/12 is -100/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 84 × 1 = 84,
   90/84 = 90 × 1/84 × 1 = 90/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   70/12 = 70 × 7/12 × 7 = 490/84
4. Subtract the two like fractions:
   90/84 - 490/84 = 90 - 490/84 = -400/84
5. After reducing the fraction, the answer is -100/21

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