Add 4/90 and 98/21
1st number: 4/90, 2nd number: 4 14/21
4/90 + 98/21 is 212/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
4/90 = 4 × 7/90 × 7 = 28/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
98/21 = 98 × 30/21 × 30 = 2940/630 - Add the two like fractions:
28/630 + 2940/630 = 28 + 2940/630 = 2968/630 - 2968/630 simplified gives 212/45
- So, 4/90 + 98/21 = 212/45
In mixed form: 432/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90+98/21 4/90+98/42 12/90+98/21 4/90+98/63 20/90+98/21 28/90+98/21