Subtract 63/70 from 1/45
1/45 - 63/70 is -79/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
1/45 = 1 × 14/45 × 14 = 14/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
63/70 = 63 × 9/70 × 9 = 567/630 - Subtract the two like fractions:
14/630 - 567/630 = 14 - 567/630 = -553/630 - After reducing the fraction, the answer is -79/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/45-63/70 1/90-63/70 3/45-63/70 5/45-63/70 7/45-63/70