Add 90/28 and 25/30
1st number: 3 6/28, 2nd number: 25/30
90/28 + 25/30 is 85/21.
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,
25/30 = 25 × 14/30 × 14 = 350/420 - Add the two like fractions:
1350/420 + 350/420 = 1350 + 350/420 = 1700/420 - 1700/420 simplified gives 85/21
- So, 90/28 + 25/30 = 85/21
In mixed form: 41/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28+50/30 90/56+25/30 90/28+25/60 90/28+75/30 90/84+25/30 90/28+25/90