Subtract 30/18 from 90/35
1st number: 2 20/35, 2nd number: 1 12/18
90/35 - 30/18 is 19/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
90/35 = 90 × 18/35 × 18 = 1620/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
30/18 = 30 × 35/18 × 35 = 1050/630 - Subtract the two like fractions:
1620/630 - 1050/630 = 1620 - 1050/630 = 570/630 - After reducing the fraction, the answer is 19/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/35-60/18 90/70-30/18 90/35-30/36 90/35-90/18 90/35-30/54 90/35-30/90