Add 2/90 and 8/21
2/90 + 8/21 is 127/315.
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,
8/21 = 8 × 30/21 × 30 = 240/630 - Add the two like fractions:
14/630 + 240/630 = 14 + 240/630 = 254/630 - 254/630 simplified gives 127/315
- So, 2/90 + 8/21 = 127/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/90+8/21 2/90+16/21 2/90+8/42 6/90+8/21 2/90+24/21 2/90+8/63 10/90+8/21 2/90+40/21 14/90+8/21 2/90+56/21