Add 21/16 and 45/42
1st number: 1 5/16, 2nd number: 1 3/42
21/16 + 45/42 is 267/112.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 42 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
21/16 = 21 × 21/16 × 21 = 441/336 - Likewise, for the 2nd fraction, since 42 × 8 = 336,
45/42 = 45 × 8/42 × 8 = 360/336 - Add the two like fractions:
441/336 + 360/336 = 441 + 360/336 = 801/336 - 801/336 simplified gives 267/112
- So, 21/16 + 45/42 = 267/112
In mixed form: 243/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/16+45/42 21/16+90/42 21/32+45/42 21/16+45/84 63/16+45/42 21/48+45/42 21/80+45/42