Subtract 8/84 from 28/5, Solve 5 3/5

Subtract 8/84 from 28/5

1^st number: 5 3/5, 2^nd number: 8/84

28/5 - 8/84 is 578/105.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 5 × 84 = 420,
28/5 = 28 × 84/5 × 84 = 2352/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
8/84 = 8 × 5/84 × 5 = 40/420
Subtract the two like fractions:
2352/420 - 40/420 = 2352 - 40/420 = 2312/420
After reducing the fraction, the answer is 578/105
In mixed form: 553/105

MathStep (Works offline)

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