Add 20/49 and 21/90
20/49 + 21/90 is 943/1470.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 90 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 49 × 90 = 4410,
20/49 = 20 × 90/49 × 90 = 1800/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
21/90 = 21 × 49/90 × 49 = 1029/4410 - Add the two like fractions:
1800/4410 + 1029/4410 = 1800 + 1029/4410 = 2829/4410 - 2829/4410 simplified gives 943/1470
- So, 20/49 + 21/90 = 943/1470
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/49+21/90 20/49+42/90 20/98+21/90 60/49+21/90 20/49+63/90