Subtract 2/42 from 28/4, Solve 7 0/4

Subtract 2/42 from 28/4

1^st number: 7 0/4, 2^nd number: 2/42

28/4 - 2/42 is 146/21.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 4 × 21 = 84,
28/4 = 28 × 21/4 × 21 = 588/84
Likewise, for the 2nd fraction, since 42 × 2 = 84,
2/42 = 2 × 2/42 × 2 = 4/84
Subtract the two like fractions:
588/84 - 4/84 = 588 - 4/84 = 584/84
After reducing the fraction, the answer is 146/21
In mixed form: 620/21

MathStep (Works offline)

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