Add 42/90 and 3/9
42/90 + 3/9 is 4/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
3/9 = 3 × 10/9 × 10 = 30/90 - Add the two like fractions:
42/90 + 30/90 = 42 + 30/90 = 72/90 - 72/90 simplified gives 4/5
- So, 42/90 + 3/9 = 4/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+3/9 42/90+6/9 42/90+3/18 42/90+3/27 42/90+15/9 42/90+3/45 42/90+21/9 42/90+3/63