Subtract 45/42 from 48/90
1st number: 48/90, 2nd number: 1 3/42
48/90 - 45/42 is -113/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
48/90 = 48 × 7/90 × 7 = 336/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
45/42 = 45 × 15/42 × 15 = 675/630 - Subtract the two like fractions:
336/630 - 675/630 = 336 - 675/630 = -339/630 - After reducing the fraction, the answer is -113/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 96/90-45/42 48/90-90/42 48/90-45/84