Subtract 30/50 from 7/84
7/84 - 30/50 is -31/60.
Steps for subtracting fractions
- 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,
7/84 = 7 × 25/84 × 25 = 175/2100 - Likewise, for the 2nd fraction, since 50 × 42 = 2100,
30/50 = 30 × 42/50 × 42 = 1260/2100 - Subtract the two like fractions:
175/2100 - 1260/2100 = 175 - 1260/2100 = -1085/2100 - After reducing the fraction, the answer is -31/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-30/50 7/84-60/50 21/84-30/50 7/84-90/50 35/84-30/50 49/84-30/50