Subtract 30/5 from 42/28
1st number: 1 14/28, 2nd number: 6 0/5
42/28 - 30/5 is -9/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 5 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
42/28 = 42 × 5/28 × 5 = 210/140 - Likewise, for the 2nd fraction, since 5 × 28 = 140,
30/5 = 30 × 28/5 × 28 = 840/140 - Subtract the two like fractions:
210/140 - 840/140 = 210 - 840/140 = -630/140 - After reducing the fraction, the answer is -9/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28-30/5 42/28-60/5 42/56-30/5 42/28-30/10 42/28-90/5 42/84-30/5 42/28-30/15 42/28-30/25 42/28-30/35