Add 8/90 and 4/21
8/90 + 4/21 is 88/315.
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,
8/90 = 8 × 7/90 × 7 = 56/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
4/21 = 4 × 30/21 × 30 = 120/630 - Add the two like fractions:
56/630 + 120/630 = 56 + 120/630 = 176/630 - 176/630 simplified gives 88/315
- So, 8/90 + 4/21 = 88/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/90+4/21 8/90+8/21 8/90+4/42 24/90+4/21 8/90+12/21 8/90+4/63 40/90+4/21 8/90+20/21 56/90+4/21 8/90+28/21