Add 18/21 and 2/80
18/21 + 2/80 is 247/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
18/21 = 18 × 80/21 × 80 = 1440/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
2/80 = 2 × 21/80 × 21 = 42/1680 - Add the two like fractions:
1440/1680 + 42/1680 = 1440 + 42/1680 = 1482/1680 - 1482/1680 simplified gives 247/280
- So, 18/21 + 2/80 = 247/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21+2/80 18/21+4/80 18/42+2/80 54/21+2/80 18/21+6/80 18/63+2/80 90/21+2/80 18/21+10/80 18/21+14/80