Subtract 27/45 from 3/40
3/40 - 27/45 is -21/40.
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,
3/40 = 3 × 9/40 × 9 = 27/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
27/45 = 27 × 8/45 × 8 = 216/360 - Subtract the two like fractions:
27/360 - 216/360 = 27 - 216/360 = -189/360 - After reducing the fraction, the answer is -21/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/40-27/45 3/40-54/45 3/80-27/45 3/40-27/90 9/40-27/45 3/40-81/45 15/40-27/45 21/40-27/45