Add 90/10 and 1/21
1st number: 9 0/10, 2nd number: 1/21
90/10 + 1/21 is 190/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
90/10 = 90 × 21/10 × 21 = 1890/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
1/21 = 1 × 10/21 × 10 = 10/210 - Add the two like fractions:
1890/210 + 10/210 = 1890 + 10/210 = 1900/210 - 1900/210 simplified gives 190/21
- So, 90/10 + 1/21 = 190/21
In mixed form: 91/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10+2/21 90/20+1/21 90/10+1/42 90/10+3/21 90/30+1/21 90/10+1/63 90/10+5/21 90/50+1/21 90/10+7/21 90/70+1/21