Subtract 30/56 from 42/49
42/49 - 30/56 is 9/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 56 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 49 × 8 = 392,
42/49 = 42 × 8/49 × 8 = 336/392 - Likewise, for the 2nd fraction, since 56 × 7 = 392,
30/56 = 30 × 7/56 × 7 = 210/392 - Subtract the two like fractions:
336/392 - 210/392 = 336 - 210/392 = 126/392 - After reducing the fraction, the answer is 9/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/49-30/56 42/49-60/56 42/98-30/56 42/49-90/56