Answers

Subtract 8/42 from 90/30

1^st number: 3 0/30, 2^nd number: 8/42

90/30 - 8/42 is 59/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 42 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 30 × 7 = 210,
   90/30 = 90 × 7/30 × 7 = 630/210
3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
   8/42 = 8 × 5/42 × 5 = 40/210
4. Subtract the two like fractions:
   630/210 - 40/210 = 630 - 40/210 = 590/210
5. After reducing the fraction, the answer is 59/21
6. In mixed form: 217/21

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