Subtract 98/40 from 4/45, Solve 4/45

Subtract 98/40 from 4/45

1^st number: 4/45, 2^nd number: 2 18/40

4/45 - 98/40 is -85/36.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 45 × 8 = 360,
4/45 = 4 × 8/45 × 8 = 32/360
Likewise, for the 2nd fraction, since 40 × 9 = 360,
98/40 = 98 × 9/40 × 9 = 882/360
Subtract the two like fractions:
32/360 - 882/360 = 32 - 882/360 = -850/360
After reducing the fraction, the answer is -85/36

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