Subtract 1/20 from 7/4
1st number: 1 3/4, 2nd number: 1/20
7/4 - 1/20 is 17/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
7/4 = 7 × 5/4 × 5 = 35/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
1/20 = 1 × 1/20 × 1 = 1/20 - Subtract the two like fractions:
35/20 - 1/20 = 35 - 1/20 = 34/20 - After reducing the fraction, the answer is 17/10
- In mixed form: 17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/4-1/20 7/4-2/20 7/8-1/20 7/4-1/40 21/4-1/20 7/4-3/20 7/12-1/20 7/4-1/60 35/4-1/20 7/4-5/20 7/20-1/20 49/4-1/20 7/4-7/20 7/28-1/20