Add 72/70 and 12/80
1st number: 1 2/70, 2nd number: 12/80
72/70 + 12/80 is 33/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
72/70 = 72 × 8/70 × 8 = 576/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
12/80 = 12 × 7/80 × 7 = 84/560 - Add the two like fractions:
576/560 + 84/560 = 576 + 84/560 = 660/560 - 660/560 simplified gives 33/28
- So, 72/70 + 12/80 = 33/28
In mixed form: 15/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/70+24/80 72/70+36/80 72/70+60/80 72/70+84/80