Subtract 90/28 from 7/45
1st number: 7/45, 2nd number: 3 6/28
7/45 - 90/28 is -1927/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 45 × 28 = 1260,
7/45 = 7 × 28/45 × 28 = 196/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
90/28 = 90 × 45/28 × 45 = 4050/1260 - Subtract the two like fractions:
196/1260 - 4050/1260 = 196 - 4050/1260 = -3854/1260 - After reducing the fraction, the answer is -1927/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45-90/28 7/90-90/28 7/45-90/56 21/45-90/28 7/45-90/84 35/45-90/28 49/45-90/28