Subtract 42/10 from 3/84
1st number: 3/84, 2nd number: 4 2/10
3/84 - 42/10 is -583/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 10 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
3/84 = 3 × 5/84 × 5 = 15/420 - Likewise, for the 2nd fraction, since 10 × 42 = 420,
42/10 = 42 × 42/10 × 42 = 1764/420 - Subtract the two like fractions:
15/420 - 1764/420 = 15 - 1764/420 = -1749/420 - After reducing the fraction, the answer is -583/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/84-42/10 3/84-84/10 3/84-42/20 9/84-42/10 3/84-42/30 15/84-42/10 3/84-42/50 21/84-42/10 3/84-42/70