Add 20/84 and 54/40
1st number: 20/84, 2nd number: 1 14/40
20/84 + 54/40 is 667/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
20/84 = 20 × 10/84 × 10 = 200/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
54/40 = 54 × 21/40 × 21 = 1134/840 - Add the two like fractions:
200/840 + 1134/840 = 200 + 1134/840 = 1334/840 - 1334/840 simplified gives 667/420
- So, 20/84 + 54/40 = 667/420
In mixed form: 1247/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+54/40 20/84+54/80 60/84+54/40