Subtract 42/30 from 40/48
1st number: 40/48, 2nd number: 1 12/30
40/48 - 42/30 is -17/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 48 × 5 = 240,
40/48 = 40 × 5/48 × 5 = 200/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
42/30 = 42 × 8/30 × 8 = 336/240 - Subtract the two like fractions:
200/240 - 336/240 = 200 - 336/240 = -136/240 - After reducing the fraction, the answer is -17/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/48-42/30 40/48-84/30 40/96-42/30 40/48-42/60 40/48-42/90