Add 40/21 and 50/40
1st number: 1 19/21, 2nd number: 1 10/40
40/21 + 50/40 is 265/84.
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,
40/21 = 40 × 40/21 × 40 = 1600/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
50/40 = 50 × 21/40 × 21 = 1050/840 - Add the two like fractions:
1600/840 + 1050/840 = 1600 + 1050/840 = 2650/840 - 2650/840 simplified gives 265/84
- So, 40/21 + 50/40 = 265/84
In mixed form: 313/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+50/40 40/42+50/40 40/21+50/80 40/63+50/40