Add 90/30 and 21/45
1st number: 3 0/30, 2nd number: 21/45
90/30 + 21/45 is 52/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
90/30 = 90 × 3/30 × 3 = 270/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Add the two like fractions:
270/90 + 42/90 = 270 + 42/90 = 312/90 - 312/90 simplified gives 52/15
- So, 90/30 + 21/45 = 52/15
In mixed form: 37/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+42/45 90/60+21/45 90/30+21/90 90/30+63/45