Subtract 8/70 from 42/56
42/56 - 8/70 is 89/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
42/56 = 42 × 5/56 × 5 = 210/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
8/70 = 8 × 4/70 × 4 = 32/280 - Subtract the two like fractions:
210/280 - 32/280 = 210 - 32/280 = 178/280 - After reducing the fraction, the answer is 89/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/56-8/70 42/56-16/70 42/56-24/70 42/56-40/70 42/56-56/70