Subtract 1/70 from 4/72
4/72 - 1/70 is 13/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
4/72 = 4 × 35/72 × 35 = 140/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
1/70 = 1 × 36/70 × 36 = 36/2520 - Subtract the two like fractions:
140/2520 - 36/2520 = 140 - 36/2520 = 104/2520 - After reducing the fraction, the answer is 13/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/72-1/70 4/72-2/70 12/72-1/70 4/72-3/70 20/72-1/70 4/72-5/70 28/72-1/70 4/72-7/70