Subtract 70/20 from 18/16
1st number: 1 2/16, 2nd number: 3 10/20
18/16 - 70/20 is -19/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
18/16 = 18 × 5/16 × 5 = 90/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
70/20 = 70 × 4/20 × 4 = 280/80 - Subtract the two like fractions:
90/80 - 280/80 = 90 - 280/80 = -190/80 - After reducing the fraction, the answer is -19/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/16-70/20 18/32-70/20 18/16-70/40 54/16-70/20 18/48-70/20 18/16-70/60 90/16-70/20 18/80-70/20