Subtract 7/90 from 45/40
1st number: 1 5/40, 2nd number: 7/90
45/40 - 7/90 is 377/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
45/40 = 45 × 9/40 × 9 = 405/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
7/90 = 7 × 4/90 × 4 = 28/360 - Subtract the two like fractions:
405/360 - 28/360 = 405 - 28/360 = 377/360 - In mixed form: 117/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40-7/90 45/40-14/90 45/80-7/90 45/40-21/90 45/40-35/90 45/40-49/90