Subtract 50/70 from 7/45
7/45 - 50/70 is -176/315.
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,
7/45 = 7 × 14/45 × 14 = 98/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
50/70 = 50 × 9/70 × 9 = 450/630 - Subtract the two like fractions:
98/630 - 450/630 = 98 - 450/630 = -352/630 - After reducing the fraction, the answer is -176/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45-50/70 7/90-50/70 21/45-50/70 35/45-50/70 49/45-50/70