Subtract 30/4 from 20/84
1st number: 20/84, 2nd number: 7 2/4
20/84 - 30/4 is -305/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
20/84 = 20 × 1/84 × 1 = 20/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
30/4 = 30 × 21/4 × 21 = 630/84 - Subtract the two like fractions:
20/84 - 630/84 = 20 - 630/84 = -610/84 - After reducing the fraction, the answer is -305/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84-30/4 20/84-60/4 20/84-30/8 60/84-30/4 20/84-90/4 20/84-30/12 20/84-30/20 20/84-30/28