Add 28/84 and 1/20
28/84 + 1/20 is 23/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
28/84 = 28 × 5/84 × 5 = 140/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
1/20 = 1 × 21/20 × 21 = 21/420 - Add the two like fractions:
140/420 + 21/420 = 140 + 21/420 = 161/420 - 161/420 simplified gives 23/60
- So, 28/84 + 1/20 = 23/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/84+1/20 28/84+2/20 28/84+1/40 28/84+3/20 28/84+1/60 28/84+5/20 28/84+7/20