Add 45/90 and 21/98
45/90 + 21/98 is 5/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 98 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 90 × 49 = 4410,
45/90 = 45 × 49/90 × 49 = 2205/4410 - Likewise, for the 2nd fraction, since 98 × 45 = 4410,
21/98 = 21 × 45/98 × 45 = 945/4410 - Add the two like fractions:
2205/4410 + 945/4410 = 2205 + 945/4410 = 3150/4410 - 3150/4410 simplified gives 5/7
- So, 45/90 + 21/98 = 5/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 45/90+42/98 45/90+63/98