Subtract 8/90 from 42/30
1st number: 1 12/30, 2nd number: 8/90
42/30 - 8/90 is 59/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
42/30 = 42 × 3/30 × 3 = 126/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
8/90 = 8 × 1/90 × 1 = 8/90 - Subtract the two like fractions:
126/90 - 8/90 = 126 - 8/90 = 118/90 - After reducing the fraction, the answer is 59/45
- In mixed form: 114/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-8/90 42/30-16/90 42/60-8/90 42/30-24/90 42/90-8/90 42/30-40/90 42/30-56/90