Subtract 70/18 from 60/21
1st number: 2 18/21, 2nd number: 3 16/18
60/21 - 70/18 is -65/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
60/21 = 60 × 6/21 × 6 = 360/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126 - Subtract the two like fractions:
360/126 - 490/126 = 360 - 490/126 = -130/126 - After reducing the fraction, the answer is -65/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42-70/18 60/21-70/36 60/63-70/18 60/21-70/54 60/21-70/90