Subtract 12/90 from 42/25
1st number: 1 17/25, 2nd number: 12/90
42/25 - 12/90 is 116/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
42/25 = 42 × 18/25 × 18 = 756/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
12/90 = 12 × 5/90 × 5 = 60/450 - Subtract the two like fractions:
756/450 - 60/450 = 756 - 60/450 = 696/450 - After reducing the fraction, the answer is 116/75
- In mixed form: 141/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/25-12/90 42/25-24/90 42/50-12/90 42/25-36/90 42/75-12/90 42/25-60/90 42/25-84/90