Subtract 4/50 from 3/84, Solve 3/84

Subtract 4/50 from 3/84

3/84 - 4/50 is -31/700.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 50 is 2100

Next, find the equivalent fraction of both fractional numbers with denominator 2100
For the 1st fraction, since 84 × 25 = 2100,
3/84 = 3 × 25/84 × 25 = 75/2100
Likewise, for the 2nd fraction, since 50 × 42 = 2100,
4/50 = 4 × 42/50 × 42 = 168/2100
Subtract the two like fractions:
75/2100 - 168/2100 = 75 - 168/2100 = -93/2100
After reducing the fraction, the answer is -31/700

MathStep (Works offline)

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