Subtract 2/72 from 70/40
1st number: 1 30/40, 2nd number: 2/72
70/40 - 2/72 is 31/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
70/40 = 70 × 9/40 × 9 = 630/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
2/72 = 2 × 5/72 × 5 = 10/360 - Subtract the two like fractions:
630/360 - 10/360 = 630 - 10/360 = 620/360 - After reducing the fraction, the answer is 31/18
- In mixed form: 113/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40-4/72 70/80-2/72 70/40-6/72 70/40-10/72 70/40-14/72