Subtract 70/40 from 70/18
1st number: 3 16/18, 2nd number: 1 30/40
70/18 - 70/40 is 77/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
70/18 = 70 × 20/18 × 20 = 1400/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
70/40 = 70 × 9/40 × 9 = 630/360 - Subtract the two like fractions:
1400/360 - 630/360 = 1400 - 630/360 = 770/360 - After reducing the fraction, the answer is 77/36
- In mixed form: 25/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/36-70/40 70/18-70/80 70/54-70/40 70/90-70/40