Add 21/35 and 15/16
21/35 + 15/16 is 123/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 16 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 35 × 16 = 560,
21/35 = 21 × 16/35 × 16 = 336/560 - Likewise, for the 2nd fraction, since 16 × 35 = 560,
15/16 = 15 × 35/16 × 35 = 525/560 - Add the two like fractions:
336/560 + 525/560 = 336 + 525/560 = 861/560 - 861/560 simplified gives 123/80
- So, 21/35 + 15/16 = 123/80
In mixed form: 143/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35+15/16 21/35+30/16 21/70+15/16 21/35+15/32 63/35+15/16 21/35+45/16 21/35+15/48 21/35+75/16 21/35+15/80