Add 21/80 and 96/90
1st number: 21/80, 2nd number: 1 6/90
21/80 + 96/90 is 319/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
96/90 = 96 × 8/90 × 8 = 768/720 - Add the two like fractions:
189/720 + 768/720 = 189 + 768/720 = 957/720 - 957/720 simplified gives 319/240
- So, 21/80 + 96/90 = 319/240
In mixed form: 179/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80+96/90 63/80+96/90