Add 2/21 and 54/40
1st number: 2/21, 2nd number: 1 14/40
2/21 + 54/40 is 607/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
2/21 = 2 × 40/21 × 40 = 80/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
54/40 = 54 × 21/40 × 21 = 1134/840 - Add the two like fractions:
80/840 + 1134/840 = 80 + 1134/840 = 1214/840 - 1214/840 simplified gives 607/420
- So, 2/21 + 54/40 = 607/420
In mixed form: 1187/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+54/40 2/42+54/40 2/21+54/80 6/21+54/40 2/63+54/40 10/21+54/40 14/21+54/40