Add 5/35 and 21/90
5/35 + 21/90 is 79/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
5/35 = 5 × 18/35 × 18 = 90/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
21/90 = 21 × 7/90 × 7 = 147/630 - Add the two like fractions:
90/630 + 147/630 = 90 + 147/630 = 237/630 - 237/630 simplified gives 79/210
- So, 5/35 + 21/90 = 79/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/35+21/90 5/35+42/90 5/70+21/90 15/35+21/90 5/35+63/90 25/35+21/90