Add 72/84 and 80/45
1st number: 72/84, 2nd number: 1 35/45
72/84 + 80/45 is 166/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
72/84 = 72 × 15/84 × 15 = 1080/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
80/45 = 80 × 28/45 × 28 = 2240/1260 - Add the two like fractions:
1080/1260 + 2240/1260 = 1080 + 2240/1260 = 3320/1260 - 3320/1260 simplified gives 166/63
- So, 72/84 + 80/45 = 166/63
In mixed form: 240/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/84+80/90