Add 21/4 and 10/90
1st number: 5 1/4, 2nd number: 10/90
21/4 + 10/90 is 193/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
21/4 = 21 × 45/4 × 45 = 945/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
10/90 = 10 × 2/90 × 2 = 20/180 - Add the two like fractions:
945/180 + 20/180 = 945 + 20/180 = 965/180 - 965/180 simplified gives 193/36
- So, 21/4 + 10/90 = 193/36
In mixed form: 513/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4+10/90 21/4+20/90 21/8+10/90 63/4+10/90 21/4+30/90 21/12+10/90 21/4+50/90 21/20+10/90 21/4+70/90 21/28+10/90