Subtract 45/30 from 70/42
1st number: 1 28/42, 2nd number: 1 15/30
70/42 - 45/30 is 1/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
70/42 = 70 × 5/42 × 5 = 350/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
45/30 = 45 × 7/30 × 7 = 315/210 - Subtract the two like fractions:
350/210 - 315/210 = 350 - 315/210 = 35/210 - After reducing the fraction, the answer is 1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42-90/30 70/84-45/30 70/42-45/60 70/42-45/90