Subtract 63/18 from 90/20
1st number: 4 10/20, 2nd number: 3 9/18
90/20 - 63/18 is 1/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
90/20 = 90 × 9/20 × 9 = 810/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
63/18 = 63 × 10/18 × 10 = 630/180 - Subtract the two like fractions:
810/180 - 630/180 = 810 - 630/180 = 180/180 - After reducing the fraction, the answer is 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40-63/18 90/20-63/36 90/60-63/18 90/20-63/54 90/20-63/90