Subtract 18/10 from 72/98, Solve 72/98

Subtract 18/10 from 72/98

1^st number: 72/98, 2^nd number: 1 8/10

72/98 - 18/10 is -261/245.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 10 is 490

Next, find the equivalent fraction of both fractional numbers with denominator 490
For the 1st fraction, since 98 × 5 = 490,
72/98 = 72 × 5/98 × 5 = 360/490
Likewise, for the 2nd fraction, since 10 × 49 = 490,
18/10 = 18 × 49/10 × 49 = 882/490
Subtract the two like fractions:
360/490 - 882/490 = 360 - 882/490 = -522/490
After reducing the fraction, the answer is -261/245

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