Subtract 21/9 from 40/50
1st number: 40/50, 2nd number: 2 3/9
40/50 - 21/9 is -23/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 9 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
40/50 = 40 × 9/50 × 9 = 360/450 - Likewise, for the 2nd fraction, since 9 × 50 = 450,
21/9 = 21 × 50/9 × 50 = 1050/450 - Subtract the two like fractions:
360/450 - 1050/450 = 360 - 1050/450 = -690/450 - After reducing the fraction, the answer is -23/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/50-21/9 40/50-42/9 40/50-21/18 40/50-63/9 40/50-21/27 40/50-21/45 40/50-21/63