Subtract 2/45 from 18/40
18/40 - 2/45 is 73/180.
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,
18/40 = 18 × 9/40 × 9 = 162/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
2/45 = 2 × 8/45 × 8 = 16/360 - Subtract the two like fractions:
162/360 - 16/360 = 162 - 16/360 = 146/360 - After reducing the fraction, the answer is 73/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40-2/45 18/40-4/45 18/80-2/45 18/40-2/90 54/40-2/45 18/40-6/45 90/40-2/45 18/40-10/45 18/40-14/45