Subtract 9/45 from 5/4
1st number: 1 1/4, 2nd number: 9/45
5/4 - 9/45 is 21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
5/4 = 5 × 45/4 × 45 = 225/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
9/45 = 9 × 4/45 × 4 = 36/180 - Subtract the two like fractions:
225/180 - 36/180 = 225 - 36/180 = 189/180 - After reducing the fraction, the answer is 21/20
- In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/4-9/45 5/4-18/45 5/8-9/45 5/4-9/90 15/4-9/45 5/4-27/45 5/12-9/45 25/4-9/45 5/20-9/45 35/4-9/45 5/4-63/45 5/28-9/45