Subtract 2/30 from 81/84
81/84 - 2/30 is 377/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
81/84 = 81 × 5/84 × 5 = 405/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
2/30 = 2 × 14/30 × 14 = 28/420 - Subtract the two like fractions:
405/420 - 28/420 = 405 - 28/420 = 377/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/84-4/30 81/84-2/60 81/84-6/30 81/84-2/90 81/84-10/30 81/84-14/30