Subtract 84/80 from 48/42
1st number: 1 6/42, 2nd number: 1 4/80
48/42 - 84/80 is 13/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
48/42 = 48 × 40/42 × 40 = 1920/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
84/80 = 84 × 21/80 × 21 = 1764/1680 - Subtract the two like fractions:
1920/1680 - 1764/1680 = 1920 - 1764/1680 = 156/1680 - After reducing the fraction, the answer is 13/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 96/42-84/80 48/84-84/80