Add 21/45 and 2/90
21/45 + 2/90 is 22/45.
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,
21/45 = 21 × 2/45 × 2 = 42/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
2/90 = 2 × 1/90 × 1 = 2/90 - Add the two like fractions:
42/90 + 2/90 = 42 + 2/90 = 44/90 - 44/90 simplified gives 22/45
- So, 21/45 + 2/90 = 22/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+2/90 21/45+4/90 21/90+2/90 63/45+2/90 21/45+6/90 21/45+10/90 21/45+14/90