Add 2/90 and 5/21
2/90 + 5/21 is 82/315.
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,
2/90 = 2 × 7/90 × 7 = 14/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
5/21 = 5 × 30/21 × 30 = 150/630 - Add the two like fractions:
14/630 + 150/630 = 14 + 150/630 = 164/630 - 164/630 simplified gives 82/315
- So, 2/90 + 5/21 = 82/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/90+5/21 2/90+10/21 2/90+5/42 6/90+5/21 2/90+15/21 2/90+5/63 10/90+5/21 2/90+25/21 14/90+5/21 2/90+35/21