Subtract 18/20 from 70/4
1st number: 17 2/4, 2nd number: 18/20
70/4 - 18/20 is 83/5.
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,
70/4 = 70 × 5/4 × 5 = 350/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
18/20 = 18 × 1/20 × 1 = 18/20 - Subtract the two like fractions:
350/20 - 18/20 = 350 - 18/20 = 332/20 - After reducing the fraction, the answer is 83/5
- In mixed form: 163/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/4-36/20 70/8-18/20 70/4-18/40 70/4-54/20 70/12-18/20 70/4-18/60 70/4-90/20 70/20-18/20 70/28-18/20