Add 20/30 and 45/28
1st number: 20/30, 2nd number: 1 17/28
20/30 + 45/28 is 191/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
20/30 = 20 × 14/30 × 14 = 280/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
45/28 = 45 × 15/28 × 15 = 675/420 - Add the two like fractions:
280/420 + 675/420 = 280 + 675/420 = 955/420 - 955/420 simplified gives 191/84
- So, 20/30 + 45/28 = 191/84
In mixed form: 223/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/30+45/28 20/30+90/28 20/60+45/28 20/30+45/56 60/30+45/28 20/90+45/28 20/30+45/84