Add 3/42 and 63/40
1st number: 3/42, 2nd number: 1 23/40
3/42 + 63/40 is 461/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
3/42 = 3 × 20/42 × 20 = 60/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
63/40 = 63 × 21/40 × 21 = 1323/840 - Add the two like fractions:
60/840 + 1323/840 = 60 + 1323/840 = 1383/840 - 1383/840 simplified gives 461/280
- So, 3/42 + 63/40 = 461/280
In mixed form: 1181/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+63/40 3/84+63/40 3/42+63/80 9/42+63/40 15/42+63/40 21/42+63/40