Add 45/30 and 54/84
1st number: 1 15/30, 2nd number: 54/84
45/30 + 54/84 is 15/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
45/30 = 45 × 14/30 × 14 = 630/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
54/84 = 54 × 5/84 × 5 = 270/420 - Add the two like fractions:
630/420 + 270/420 = 630 + 270/420 = 900/420 - 900/420 simplified gives 15/7
- So, 45/30 + 54/84 = 15/7
In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+54/84 45/60+54/84 45/90+54/84