Subtract 8/70 from 72/42
1st number: 1 30/42, 2nd number: 8/70
72/42 - 8/70 is 8/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
72/42 = 72 × 5/42 × 5 = 360/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
8/70 = 8 × 3/70 × 3 = 24/210 - Subtract the two like fractions:
360/210 - 24/210 = 360 - 24/210 = 336/210 - After reducing the fraction, the answer is 8/5
- In mixed form: 13/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42-16/70 72/84-8/70 72/42-24/70 72/42-40/70 72/42-56/70