Subtract 18/30 from 36/45
36/45 - 18/30 is 1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
36/45 = 36 × 2/45 × 2 = 72/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
18/30 = 18 × 3/30 × 3 = 54/90 - Subtract the two like fractions:
72/90 - 54/90 = 72 - 54/90 = 18/90 - After reducing the fraction, the answer is 1/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/45-18/30 36/45-36/30 36/90-18/30 36/45-18/60 36/45-54/30 36/45-18/90 36/45-90/30