Subtract 75/45 from 7/40
1st number: 7/40, 2nd number: 1 30/45
7/40 - 75/45 is -179/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
7/40 = 7 × 9/40 × 9 = 63/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
75/45 = 75 × 8/45 × 8 = 600/360 - Subtract the two like fractions:
63/360 - 600/360 = 63 - 600/360 = -537/360 - After reducing the fraction, the answer is -179/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/40-75/45 7/80-75/45 7/40-75/90 21/40-75/45 35/40-75/45 49/40-75/45