Add 4/21 and 50/40
1st number: 4/21, 2nd number: 1 10/40
4/21 + 50/40 is 121/84.
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,
4/21 = 4 × 40/21 × 40 = 160/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
50/40 = 50 × 21/40 × 21 = 1050/840 - Add the two like fractions:
160/840 + 1050/840 = 160 + 1050/840 = 1210/840 - 1210/840 simplified gives 121/84
- So, 4/21 + 50/40 = 121/84
In mixed form: 137/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+50/40 4/42+50/40 4/21+50/80 12/21+50/40 4/63+50/40 20/21+50/40 28/21+50/40