Add 18/28 and 4/90
18/28 + 4/90 is 433/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
18/28 = 18 × 45/28 × 45 = 810/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
4/90 = 4 × 14/90 × 14 = 56/1260 - Add the two like fractions:
810/1260 + 56/1260 = 810 + 56/1260 = 866/1260 - 866/1260 simplified gives 433/630
- So, 18/28 + 4/90 = 433/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28+4/90 18/28+8/90 18/56+4/90 54/28+4/90 18/28+12/90 18/84+4/90 90/28+4/90 18/28+20/90 18/28+28/90