Add 40/2 and 50/21
1st number: 20 0/2, 2nd number: 2 8/21
40/2 + 50/21 is 470/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
40/2 = 40 × 21/2 × 21 = 840/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
50/21 = 50 × 2/21 × 2 = 100/42 - Add the two like fractions:
840/42 + 100/42 = 840 + 100/42 = 940/42 - 940/42 simplified gives 470/21
- So, 40/2 + 50/21 = 470/21
In mixed form: 228/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/2+50/21 40/4+50/21 40/2+50/42 40/6+50/21 40/2+50/63 40/10+50/21 40/14+50/21