Add 28/72 and 5/70
28/72 + 5/70 is 29/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
28/72 = 28 × 35/72 × 35 = 980/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
5/70 = 5 × 36/70 × 36 = 180/2520 - Add the two like fractions:
980/2520 + 180/2520 = 980 + 180/2520 = 1160/2520 - 1160/2520 simplified gives 29/63
- So, 28/72 + 5/70 = 29/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/72+5/70 28/72+10/70 84/72+5/70 28/72+15/70 28/72+25/70 28/72+35/70