Subtract 28/7 from 2/45, Solve 2/45

Subtract 28/7 from 2/45

1^st number: 2/45, 2^nd number: 4 0/7

2/45 - 28/7 is -178/45.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
2/45 = 2 × 7/45 × 7 = 14/315
Likewise, for the 2nd fraction, since 7 × 45 = 315,
28/7 = 28 × 45/7 × 45 = 1260/315
Subtract the two like fractions:
14/315 - 1260/315 = 14 - 1260/315 = -1246/315
After reducing the fraction, the answer is -178/45

MathStep (Works offline)

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