Subtract 18/10 from 7/40
1st number: 7/40, 2nd number: 1 8/10
7/40 - 18/10 is -13/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 10 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
7/40 = 7 × 1/40 × 1 = 7/40 - Likewise, for the 2nd fraction, since 10 × 4 = 40,
18/10 = 18 × 4/10 × 4 = 72/40 - Subtract the two like fractions:
7/40 - 72/40 = 7 - 72/40 = -65/40 - After reducing the fraction, the answer is -13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/40-18/10 7/40-36/10 7/80-18/10 7/40-18/20 21/40-18/10 7/40-54/10 7/40-18/30 35/40-18/10 7/40-90/10 7/40-18/50 49/40-18/10 7/40-18/70