Subtract 18/24 from 28/70
28/70 - 18/24 is -7/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 24 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 70 × 12 = 840,
28/70 = 28 × 12/70 × 12 = 336/840 - Likewise, for the 2nd fraction, since 24 × 35 = 840,
18/24 = 18 × 35/24 × 35 = 630/840 - Subtract the two like fractions:
336/840 - 630/840 = 336 - 630/840 = -294/840 - After reducing the fraction, the answer is -7/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70-18/24 28/70-36/24 28/70-18/48 84/70-18/24 28/70-54/24 28/70-18/72 28/70-90/24