Subtract 21/9 from 35/40
1st number: 35/40, 2nd number: 2 3/9
35/40 - 21/9 is -35/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
35/40 = 35 × 9/40 × 9 = 315/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
21/9 = 21 × 40/9 × 40 = 840/360 - Subtract the two like fractions:
315/360 - 840/360 = 315 - 840/360 = -525/360 - After reducing the fraction, the answer is -35/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40-21/9 35/40-42/9 35/80-21/9 35/40-21/18 35/40-63/9 35/40-21/27 35/40-21/45 35/40-21/63