Subtract 42/80 from 49/84
49/84 - 42/80 is 7/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 84 × 20 = 1680,
49/84 = 49 × 20/84 × 20 = 980/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
42/80 = 42 × 21/80 × 21 = 882/1680 - Subtract the two like fractions:
980/1680 - 882/1680 = 980 - 882/1680 = 98/1680 - After reducing the fraction, the answer is 7/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/84-42/80 49/84-84/80