Subtract 35/21 from 9/40
1st number: 9/40, 2nd number: 1 14/21
9/40 - 35/21 is -173/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
9/40 = 9 × 21/40 × 21 = 189/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
35/21 = 35 × 40/21 × 40 = 1400/840 - Subtract the two like fractions:
189/840 - 1400/840 = 189 - 1400/840 = -1211/840 - After reducing the fraction, the answer is -173/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40-35/21 9/40-70/21 9/80-35/21 9/40-35/42 27/40-35/21 9/40-35/63 45/40-35/21 63/40-35/21