Subtract 6/72 from 42/70
42/70 - 6/72 is 31/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 70 × 36 = 2520,
42/70 = 42 × 36/70 × 36 = 1512/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
6/72 = 6 × 35/72 × 35 = 210/2520 - Subtract the two like fractions:
1512/2520 - 210/2520 = 1512 - 210/2520 = 1302/2520 - After reducing the fraction, the answer is 31/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70-6/72 42/70-12/72 42/70-18/72 42/70-30/72 42/70-42/72