Subtract 7/9 from 98/20, Solve 4 18/20

Subtract 7/9 from 98/20

1^st number: 4 18/20, 2^nd number: 7/9

98/20 - 7/9 is 371/90.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 20 × 9 = 180,
98/20 = 98 × 9/20 × 9 = 882/180
Likewise, for the 2nd fraction, since 9 × 20 = 180,
7/9 = 7 × 20/9 × 20 = 140/180
Subtract the two like fractions:
882/180 - 140/180 = 882 - 140/180 = 742/180
After reducing the fraction, the answer is 371/90
In mixed form: 411/90

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