Subtract 5/84 from 5/4, Solve 1 1/4

Subtract 5/84 from 5/4

1^st number: 1 1/4, 2^nd number: 5/84

5/4 - 5/84 is 25/21.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 84 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 4 × 21 = 84,
5/4 = 5 × 21/4 × 21 = 105/84
Likewise, for the 2nd fraction, since 84 × 1 = 84,
5/84 = 5 × 1/84 × 1 = 5/84
Subtract the two like fractions:
105/84 - 5/84 = 105 - 5/84 = 100/84
After reducing the fraction, the answer is 25/21
In mixed form: 14/21

MathStep (Works offline)

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