Subtract 18/90 from 36/75
36/75 - 18/90 is 7/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
36/75 = 36 × 6/75 × 6 = 216/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
18/90 = 18 × 5/90 × 5 = 90/450 - Subtract the two like fractions:
216/450 - 90/450 = 216 - 90/450 = 126/450 - After reducing the fraction, the answer is 7/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/75-18/90 36/75-36/90 36/75-54/90