Add 40/16 and 50/21
1st number: 2 8/16, 2nd number: 2 8/21
40/16 + 50/21 is 205/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 21 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
40/16 = 40 × 21/16 × 21 = 840/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
50/21 = 50 × 16/21 × 16 = 800/336 - Add the two like fractions:
840/336 + 800/336 = 840 + 800/336 = 1640/336 - 1640/336 simplified gives 205/42
- So, 40/16 + 50/21 = 205/42
In mixed form: 437/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/16+50/21 40/32+50/21 40/16+50/42 40/48+50/21 40/16+50/63 40/80+50/21