Subtract 90/6 from 70/42
1st number: 1 28/42, 2nd number: 15 0/6
70/42 - 90/6 is -40/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
70/42 = 70 × 1/42 × 1 = 70/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
90/6 = 90 × 7/6 × 7 = 630/42 - Subtract the two like fractions:
70/42 - 630/42 = 70 - 630/42 = -560/42 - After reducing the fraction, the answer is -40/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84-90/6 70/42-90/12 70/42-90/18 70/42-90/30 70/42-90/42