Subtract 80/45 from 21/24
1st number: 21/24, 2nd number: 1 35/45
21/24 - 80/45 is -65/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
21/24 = 21 × 15/24 × 15 = 315/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
80/45 = 80 × 8/45 × 8 = 640/360 - Subtract the two like fractions:
315/360 - 640/360 = 315 - 640/360 = -325/360 - After reducing the fraction, the answer is -65/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24-80/45 21/48-80/45 21/24-80/90 63/24-80/45 21/72-80/45