Subtract 4/70 from 42/48, Solve 42/48

Subtract 4/70 from 42/48

42/48 - 4/70 is 229/280.

Find the least common denominator or LCM of the two denominators:
LCM of 48 and 70 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 48 × 35 = 1680,
42/48 = 42 × 35/48 × 35 = 1470/1680
Likewise, for the 2nd fraction, since 70 × 24 = 1680,
4/70 = 4 × 24/70 × 24 = 96/1680
Subtract the two like fractions:
1470/1680 - 96/1680 = 1470 - 96/1680 = 1374/1680
After reducing the fraction, the answer is 229/280

MathStep (Works offline)

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