Subtract 24/42 from 25/90
25/90 - 24/42 is -37/126.
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,
25/90 = 25 × 7/90 × 7 = 175/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
24/42 = 24 × 15/42 × 15 = 360/630 - Subtract the two like fractions:
175/630 - 360/630 = 175 - 360/630 = -185/630 - After reducing the fraction, the answer is -37/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/90-24/42 25/90-48/42 25/90-24/84 75/90-24/42 25/90-72/42