Add 18/30 and 21/25
18/30 + 21/25 is 36/25.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 25 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 30 × 5 = 150,
18/30 = 18 × 5/30 × 5 = 90/150 - Likewise, for the 2nd fraction, since 25 × 6 = 150,
21/25 = 21 × 6/25 × 6 = 126/150 - Add the two like fractions:
90/150 + 126/150 = 90 + 126/150 = 216/150 - 216/150 simplified gives 36/25
- So, 18/30 + 21/25 = 36/25
In mixed form: 111/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30+21/25 18/30+42/25 18/60+21/25 18/30+21/50 54/30+21/25 18/30+63/25 18/90+21/25 18/30+21/75 90/30+21/25