Subtract 18/7 from 90/2
1st number: 45 0/2, 2nd number: 2 4/7
90/2 - 18/7 is 297/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 7 is 14
Next, find the equivalent fraction of both fractional numbers with denominator 14 - For the 1st fraction, since 2 × 7 = 14,
90/2 = 90 × 7/2 × 7 = 630/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
18/7 = 18 × 2/7 × 2 = 36/14 - Subtract the two like fractions:
630/14 - 36/14 = 630 - 36/14 = 594/14 - After reducing the fraction, the answer is 297/7
- In mixed form: 423/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2-36/7 90/4-18/7 90/2-18/14 90/2-54/7 90/6-18/7 90/2-18/21 90/2-90/7 90/10-18/7 90/2-18/35 90/14-18/7 90/2-18/49