Subtract 3/30 from 42/48
42/48 - 3/30 is 31/40.
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,
42/48 = 42 × 5/48 × 5 = 210/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
3/30 = 3 × 8/30 × 8 = 24/240 - Subtract the two like fractions:
210/240 - 24/240 = 210 - 24/240 = 186/240 - After reducing the fraction, the answer is 31/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/48-3/30 42/48-6/30 42/96-3/30 42/48-3/60 42/48-9/30 42/48-3/90 42/48-15/30 42/48-21/30