Subtract 10/40 from 30/35
30/35 - 10/40 is 17/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 35 × 8 = 280,
30/35 = 30 × 8/35 × 8 = 240/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
10/40 = 10 × 7/40 × 7 = 70/280 - Subtract the two like fractions:
240/280 - 70/280 = 240 - 70/280 = 170/280 - After reducing the fraction, the answer is 17/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/35-10/40 30/35-20/40 30/70-10/40 30/35-10/80 90/35-10/40 30/35-30/40 30/35-50/40 30/35-70/40