Add 45/84 and 5/20
45/84 + 5/20 is 11/14.
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,
45/84 = 45 × 5/84 × 5 = 225/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
5/20 = 5 × 21/20 × 21 = 105/420 - Add the two like fractions:
225/420 + 105/420 = 225 + 105/420 = 330/420 - 330/420 simplified gives 11/14
- So, 45/84 + 5/20 = 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84+5/20 45/84+10/20 45/84+5/40 45/84+15/20 45/84+5/60 45/84+25/20 45/84+35/20