Add 45/21 and 1/90
1st number: 2 3/21, 2nd number: 1/90
45/21 + 1/90 is 1357/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
45/21 = 45 × 30/21 × 30 = 1350/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
1/90 = 1 × 7/90 × 7 = 7/630 - Add the two like fractions:
1350/630 + 7/630 = 1350 + 7/630 = 1357/630 - So, 45/21 + 1/90 = 1357/630
In mixed form: 297/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+1/90 45/21+2/90 45/42+1/90 45/21+3/90 45/63+1/90 45/21+5/90 45/21+7/90