Answers

Subtract 12/70 from 98/90

1^st number: 1 8/90, 2^nd number: 12/70

98/90 - 12/70 is 289/315.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 70 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   98/90 = 98 × 7/90 × 7 = 686/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   12/70 = 12 × 9/70 × 9 = 108/630
4. Subtract the two like fractions:
   686/630 - 108/630 = 686 - 108/630 = 578/630
5. After reducing the fraction, the answer is 289/315

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