Subtract 45/6 from 21/20
1st number: 1 1/20, 2nd number: 7 3/6
21/20 - 45/6 is -129/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 6 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
21/20 = 21 × 3/20 × 3 = 63/60 - Likewise, for the 2nd fraction, since 6 × 10 = 60,
45/6 = 45 × 10/6 × 10 = 450/60 - Subtract the two like fractions:
63/60 - 450/60 = 63 - 450/60 = -387/60 - After reducing the fraction, the answer is -129/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20-45/6 21/20-90/6 21/40-45/6 21/20-45/12 63/20-45/6 21/60-45/6 21/20-45/18 21/20-45/30 21/20-45/42