Add 72/84 and 12/16
72/84 + 12/16 is 45/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 84 × 4 = 336,
72/84 = 72 × 4/84 × 4 = 288/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
12/16 = 12 × 21/16 × 21 = 252/336 - Add the two like fractions:
288/336 + 252/336 = 288 + 252/336 = 540/336 - 540/336 simplified gives 45/28
- So, 72/84 + 12/16 = 45/28
In mixed form: 117/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/84+24/16 72/84+12/32 72/84+36/16 72/84+12/48 72/84+60/16 72/84+12/80 72/84+84/16