Subtract 18/40 from 35/21
1st number: 1 14/21, 2nd number: 18/40
35/21 - 18/40 is 73/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
35/21 = 35 × 40/21 × 40 = 1400/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
18/40 = 18 × 21/40 × 21 = 378/840 - Subtract the two like fractions:
1400/840 - 378/840 = 1400 - 378/840 = 1022/840 - After reducing the fraction, the answer is 73/60
- In mixed form: 113/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-18/40 35/21-36/40 35/42-18/40 35/21-18/80 35/21-54/40 35/63-18/40 35/21-90/40