Answers

Subtract 4/90 from 98/80

1^st number: 1 18/80, 2^nd number: 4/90

98/80 - 4/90 is 85/72.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 90 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 80 × 9 = 720,
   98/80 = 98 × 9/80 × 9 = 882/720
3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
   4/90 = 4 × 8/90 × 8 = 32/720
4. Subtract the two like fractions:
   882/720 - 32/720 = 882 - 32/720 = 850/720
5. After reducing the fraction, the answer is 85/72
6. In mixed form: 113/72

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