Subtract 84/7 from 18/4
1st number: 4 2/4, 2nd number: 12 0/7
18/4 - 84/7 is -15/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 4 × 7 = 28,
18/4 = 18 × 7/4 × 7 = 126/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
84/7 = 84 × 4/7 × 4 = 336/28 - Subtract the two like fractions:
126/28 - 336/28 = 126 - 336/28 = -210/28 - After reducing the fraction, the answer is -15/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4-84/7 18/8-84/7 18/4-84/14 54/4-84/7 18/12-84/7 18/4-84/21 90/4-84/7 18/20-84/7 18/4-84/35 18/28-84/7 18/4-84/49