Add 9/30 and 42/90
9/30 + 42/90 is 23/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
9/30 = 9 × 3/30 × 3 = 27/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Add the two like fractions:
27/90 + 42/90 = 27 + 42/90 = 69/90 - 69/90 simplified gives 23/30
- So, 9/30 + 42/90 = 23/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30+42/90 9/30+84/90 9/60+42/90 27/30+42/90 9/90+42/90 45/30+42/90 63/30+42/90