Subtract 8/5 from 72/98, Solve 72/98

Subtract 8/5 from 72/98

1^st number: 72/98, 2^nd number: 1 3/5

72/98 - 8/5 is -212/245.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 5 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 5 × 98 = 490,
8/5 = 8 × 98/5 × 98 = 784/490
Subtract the two like fractions:
360/490 - 784/490 = 360 - 784/490 = -424/490
After reducing the fraction, the answer is -212/245

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad