Subtract 1/42 from 98/80, Solve 1 18/80

Subtract 1/42 from 98/80

1^st number: 1 18/80, 2^nd number: 1/42

98/80 - 1/42 is 1009/840.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 80 × 21 = 1680,
98/80 = 98 × 21/80 × 21 = 2058/1680
Likewise, for the 2nd fraction, since 42 × 40 = 1680,
1/42 = 1 × 40/42 × 40 = 40/1680
Subtract the two like fractions:
2058/1680 - 40/1680 = 2058 - 40/1680 = 2018/1680
After reducing the fraction, the answer is 1009/840
In mixed form: 1169/840

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