Subtract 10/45 from 7/40
7/40 - 10/45 is -17/360.
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,
10/45 = 10 × 8/45 × 8 = 80/360 - Subtract the two like fractions:
63/360 - 80/360 = 63 - 80/360 = -17/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/40-10/45 7/40-20/45 7/80-10/45 7/40-10/90 21/40-10/45 7/40-30/45 35/40-10/45 7/40-50/45 49/40-10/45 7/40-70/45