Subtract 40/16 from 20/70
1st number: 20/70, 2nd number: 2 8/16
20/70 - 40/16 is -31/14.
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,
20/70 = 20 × 8/70 × 8 = 160/560 - Likewise, for the 2nd fraction, since 16 × 35 = 560,
40/16 = 40 × 35/16 × 35 = 1400/560 - Subtract the two like fractions:
160/560 - 1400/560 = 160 - 1400/560 = -1240/560 - After reducing the fraction, the answer is -31/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70-40/16 20/70-80/16 20/70-40/32 60/70-40/16 20/70-40/48 20/70-40/80