Subtract 42/70 from 72/4
1st number: 18 0/4, 2nd number: 42/70
72/4 - 42/70 is 87/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 4 × 35 = 140,
72/4 = 72 × 35/4 × 35 = 2520/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
42/70 = 42 × 2/70 × 2 = 84/140 - Subtract the two like fractions:
2520/140 - 84/140 = 2520 - 84/140 = 2436/140 - After reducing the fraction, the answer is 87/5
- In mixed form: 172/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/4-84/70 72/8-42/70 72/12-42/70 72/20-42/70 72/28-42/70