Subtract 8/90 from 42/56
42/56 - 8/90 is 119/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
42/56 = 42 × 45/56 × 45 = 1890/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
8/90 = 8 × 28/90 × 28 = 224/2520 - Subtract the two like fractions:
1890/2520 - 224/2520 = 1890 - 224/2520 = 1666/2520 - After reducing the fraction, the answer is 119/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/56-8/90 42/56-16/90 42/56-24/90 42/56-40/90 42/56-56/90