Subtract 6/40 from 3/45
3/45 - 6/40 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
3/45 = 3 × 8/45 × 8 = 24/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
6/40 = 6 × 9/40 × 9 = 54/360 - Subtract the two like fractions:
24/360 - 54/360 = 24 - 54/360 = -30/360 - After reducing the fraction, the answer is -1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/45-6/40 3/45-12/40 3/90-6/40 3/45-6/80 9/45-6/40 3/45-18/40 15/45-6/40 3/45-30/40 21/45-6/40 3/45-42/40