Add 21/8 and 16/90
1st number: 2 5/8, 2nd number: 16/90
21/8 + 16/90 is 1009/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
21/8 = 21 × 45/8 × 45 = 945/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
16/90 = 16 × 4/90 × 4 = 64/360 - Add the two like fractions:
945/360 + 64/360 = 945 + 64/360 = 1009/360 - So, 21/8 + 16/90 = 1009/360
In mixed form: 2289/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8+16/90 21/8+32/90 21/16+16/90 63/8+16/90 21/8+48/90 21/24+16/90 21/8+80/90 21/40+16/90 21/56+16/90