Subtract 80/49 from 30/27, Solve 1 3/27

Subtract 80/49 from 30/27

1^st number: 1 3/27, 2^nd number: 1 31/49

30/27 - 80/49 is -230/441.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 49 is 1323

Next, find the equivalent fraction of both fractional numbers with denominator 1323
For the 1st fraction, since 27 × 49 = 1323,
30/27 = 30 × 49/27 × 49 = 1470/1323
Likewise, for the 2nd fraction, since 49 × 27 = 1323,
80/49 = 80 × 27/49 × 27 = 2160/1323
Subtract the two like fractions:
1470/1323 - 2160/1323 = 1470 - 2160/1323 = -690/1323
After reducing the fraction, the answer is -230/441

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad