Add 3/90 and 28/42
3/90 + 28/42 is 7/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
3/90 = 3 × 7/90 × 7 = 21/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
28/42 = 28 × 15/42 × 15 = 420/630 - Add the two like fractions:
21/630 + 420/630 = 21 + 420/630 = 441/630 - 441/630 simplified gives 7/10
- So, 3/90 + 28/42 = 7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/90+28/42 3/90+56/42 3/90+28/84 9/90+28/42 3/90+84/42 15/90+28/42 21/90+28/42