Subtract 20/16 from 18/70
1st number: 18/70, 2nd number: 1 4/16
18/70 - 20/16 is -139/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 16 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
18/70 = 18 × 8/70 × 8 = 144/560 - Likewise, for the 2nd fraction, since 16 × 35 = 560,
20/16 = 20 × 35/16 × 35 = 700/560 - Subtract the two like fractions:
144/560 - 700/560 = 144 - 700/560 = -556/560 - After reducing the fraction, the answer is -139/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70-20/16 18/70-40/16 18/70-20/32 54/70-20/16 18/70-60/16 18/70-20/48 90/70-20/16 18/70-20/80