Add 20/45 and 2/90
20/45 + 2/90 is 7/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
20/45 = 20 × 2/45 × 2 = 40/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
2/90 = 2 × 1/90 × 1 = 2/90 - Add the two like fractions:
40/90 + 2/90 = 40 + 2/90 = 42/90 - 42/90 simplified gives 7/15
- So, 20/45 + 2/90 = 7/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45+2/90 20/45+4/90 20/90+2/90 60/45+2/90 20/45+6/90 20/45+10/90 20/45+14/90