Subtract 18/27 from 70/40
1st number: 1 30/40, 2nd number: 18/27
70/40 - 18/27 is 13/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 27 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
70/40 = 70 × 27/40 × 27 = 1890/1080 - Likewise, for the 2nd fraction, since 27 × 40 = 1080,
18/27 = 18 × 40/27 × 40 = 720/1080 - Subtract the two like fractions:
1890/1080 - 720/1080 = 1890 - 720/1080 = 1170/1080 - After reducing the fraction, the answer is 13/12
- In mixed form: 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40-36/27 70/80-18/27 70/40-18/54 70/40-54/27 70/40-18/81 70/40-90/27