Subtract 70/90 from 3/35
3/35 - 70/90 is -218/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
3/35 = 3 × 18/35 × 18 = 54/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
70/90 = 70 × 7/90 × 7 = 490/630 - Subtract the two like fractions:
54/630 - 490/630 = 54 - 490/630 = -436/630 - After reducing the fraction, the answer is -218/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/35-70/90 3/70-70/90 9/35-70/90 15/35-70/90 21/35-70/90