Add 18/80 and 75/84
18/80 + 75/84 is 313/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 84 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
18/80 = 18 × 21/80 × 21 = 378/1680 - Likewise, for the 2nd fraction, since 84 × 20 = 1680,
75/84 = 75 × 20/84 × 20 = 1500/1680 - Add the two like fractions:
378/1680 + 1500/1680 = 378 + 1500/1680 = 1878/1680 - 1878/1680 simplified gives 313/280
- So, 18/80 + 75/84 = 313/280
In mixed form: 133/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/80+75/84 54/80+75/84 90/80+75/84