Add 90/28 and 54/30
1st number: 3 6/28, 2nd number: 1 24/30
90/28 + 54/30 is 351/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
90/28 = 90 × 15/28 × 15 = 1350/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
54/30 = 54 × 14/30 × 14 = 756/420 - Add the two like fractions:
1350/420 + 756/420 = 1350 + 756/420 = 2106/420 - 2106/420 simplified gives 351/70
- So, 90/28 + 54/30 = 351/70
In mixed form: 51/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/56+54/30 90/28+54/60 90/84+54/30 90/28+54/90