Subtract 45/42 from 16/90
1st number: 16/90, 2nd number: 1 3/42
16/90 - 45/42 is -563/630.
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,
16/90 = 16 × 7/90 × 7 = 112/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
45/42 = 45 × 15/42 × 15 = 675/630 - Subtract the two like fractions:
112/630 - 675/630 = 112 - 675/630 = -563/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/90-45/42 16/90-90/42 16/90-45/84 48/90-45/42 80/90-45/42