Subtract 20/90 from 40/35
1st number: 1 5/35, 2nd number: 20/90
40/35 - 20/90 is 58/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
40/35 = 40 × 18/35 × 18 = 720/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
20/90 = 20 × 7/90 × 7 = 140/630 - Subtract the two like fractions:
720/630 - 140/630 = 720 - 140/630 = 580/630 - After reducing the fraction, the answer is 58/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/35-20/90 40/35-40/90 40/70-20/90 40/35-60/90