Add 10/90 and 21/8
1st number: 10/90, 2nd number: 2 5/8
10/90 + 21/8 is 197/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
10/90 = 10 × 4/90 × 4 = 40/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
21/8 = 21 × 45/8 × 45 = 945/360 - Add the two like fractions:
40/360 + 945/360 = 40 + 945/360 = 985/360 - 985/360 simplified gives 197/72
- So, 10/90 + 21/8 = 197/72
In mixed form: 253/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/90+21/8 10/90+42/8 10/90+21/16 30/90+21/8 10/90+63/8 10/90+21/24 50/90+21/8 10/90+21/40 70/90+21/8 10/90+21/56