Subtract 9/70 from 42/56
42/56 - 9/70 is 87/140.
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,
9/70 = 9 × 4/70 × 4 = 36/280 - Subtract the two like fractions:
210/280 - 36/280 = 210 - 36/280 = 174/280 - After reducing the fraction, the answer is 87/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/56-9/70 42/56-18/70 42/56-27/70 42/56-45/70 42/56-63/70