Subtract 15/27 from 4/70, Solve 4/70

Subtract 15/27 from 4/70

4/70 - 15/27 is -157/315.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 27 is 1890

Next, find the equivalent fraction of both fractional numbers with denominator 1890
For the 1st fraction, since 70 × 27 = 1890,
4/70 = 4 × 27/70 × 27 = 108/1890
Likewise, for the 2nd fraction, since 27 × 70 = 1890,
15/27 = 15 × 70/27 × 70 = 1050/1890
Subtract the two like fractions:
108/1890 - 1050/1890 = 108 - 1050/1890 = -942/1890
After reducing the fraction, the answer is -157/315

MathStep (Works offline)

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