Add 21/27 and 14/90
21/27 + 14/90 is 14/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 90 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
21/27 = 21 × 10/27 × 10 = 210/270 - Likewise, for the 2nd fraction, since 90 × 3 = 270,
14/90 = 14 × 3/90 × 3 = 42/270 - Add the two like fractions:
210/270 + 42/270 = 210 + 42/270 = 252/270 - 252/270 simplified gives 14/15
- So, 21/27 + 14/90 = 14/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27+14/90 21/27+28/90 21/54+14/90 63/27+14/90 21/27+42/90 21/81+14/90 21/27+70/90 21/27+98/90