Add 63/42 and 1/40
1st number: 1 21/42, 2nd number: 1/40
63/42 + 1/40 is 61/40.
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,
63/42 = 63 × 20/42 × 20 = 1260/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
1/40 = 1 × 21/40 × 21 = 21/840 - Add the two like fractions:
1260/840 + 21/840 = 1260 + 21/840 = 1281/840 - 1281/840 simplified gives 61/40
- So, 63/42 + 1/40 = 61/40
In mixed form: 121/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42+2/40 63/84+1/40 63/42+1/80 63/42+3/40 63/42+5/40 63/42+7/40