Add 9/84 and 40/20
1st number: 9/84, 2nd number: 2 0/20
9/84 + 40/20 is 59/28.
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,
9/84 = 9 × 5/84 × 5 = 45/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
40/20 = 40 × 21/20 × 21 = 840/420 - Add the two like fractions:
45/420 + 840/420 = 45 + 840/420 = 885/420 - 885/420 simplified gives 59/28
- So, 9/84 + 40/20 = 59/28
In mixed form: 23/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/84+40/20 9/84+80/20 27/84+40/20 9/84+40/60 45/84+40/20 63/84+40/20