Subtract 60/84 from 21/30
21/30 - 60/84 is -1/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
21/30 = 21 × 14/30 × 14 = 294/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
60/84 = 60 × 5/84 × 5 = 300/420 - Subtract the two like fractions:
294/420 - 300/420 = 294 - 300/420 = -6/420 - After reducing the fraction, the answer is -1/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30-60/84 21/60-60/84 63/30-60/84 21/90-60/84