Subtract 90/28 from 42/10
1st number: 4 2/10, 2nd number: 3 6/28
42/10 - 90/28 is 69/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 10 × 14 = 140,
42/10 = 42 × 14/10 × 14 = 588/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
90/28 = 90 × 5/28 × 5 = 450/140 - Subtract the two like fractions:
588/140 - 450/140 = 588 - 450/140 = 138/140 - After reducing the fraction, the answer is 69/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10-90/28 42/20-90/28 42/10-90/56 42/30-90/28 42/10-90/84 42/50-90/28 42/70-90/28