Subtract 70/18 from 40/24
1st number: 1 16/24, 2nd number: 3 16/18
40/24 - 70/18 is -20/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 24 × 3 = 72,
40/24 = 40 × 3/24 × 3 = 120/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
70/18 = 70 × 4/18 × 4 = 280/72 - Subtract the two like fractions:
120/72 - 280/72 = 120 - 280/72 = -160/72 - After reducing the fraction, the answer is -20/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/24-70/18 40/48-70/18 40/24-70/36 40/72-70/18 40/24-70/54 40/24-70/90