Subtract 3/90 from 42/27
1st number: 1 15/27, 2nd number: 3/90
42/27 - 3/90 is 137/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 90 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
42/27 = 42 × 10/27 × 10 = 420/270 - Likewise, for the 2nd fraction, since 90 × 3 = 270,
3/90 = 3 × 3/90 × 3 = 9/270 - Subtract the two like fractions:
420/270 - 9/270 = 420 - 9/270 = 411/270 - After reducing the fraction, the answer is 137/90
- In mixed form: 147/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/27-3/90 42/27-6/90 42/54-3/90 42/27-9/90 42/81-3/90 42/27-15/90 42/27-21/90