Subtract 70/40 from 18/75
1st number: 18/75, 2nd number: 1 30/40
18/75 - 70/40 is -151/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 40 is 600
Next, find the equivalent fraction of both fractional numbers with denominator 600 - For the 1st fraction, since 75 × 8 = 600,
18/75 = 18 × 8/75 × 8 = 144/600 - Likewise, for the 2nd fraction, since 40 × 15 = 600,
70/40 = 70 × 15/40 × 15 = 1050/600 - Subtract the two like fractions:
144/600 - 1050/600 = 144 - 1050/600 = -906/600 - After reducing the fraction, the answer is -151/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/75-70/40 18/75-70/80 54/75-70/40 90/75-70/40