Subtract 70/75 from 42/30
1st number: 1 12/30, 2nd number: 70/75
42/30 - 70/75 is 7/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 75 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 30 × 5 = 150,
42/30 = 42 × 5/30 × 5 = 210/150 - Likewise, for the 2nd fraction, since 75 × 2 = 150,
70/75 = 70 × 2/75 × 2 = 140/150 - Subtract the two like fractions:
210/150 - 140/150 = 210 - 140/150 = 70/150 - After reducing the fraction, the answer is 7/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-70/75 42/60-70/75 42/90-70/75