Add 15/72 and 20/70
15/72 + 20/70 is 83/168.
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,
15/72 = 15 × 35/72 × 35 = 525/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
20/70 = 20 × 36/70 × 36 = 720/2520 - Add the two like fractions:
525/2520 + 720/2520 = 525 + 720/2520 = 1245/2520 - 1245/2520 simplified gives 83/168
- So, 15/72 + 20/70 = 83/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/72+20/70 15/72+40/70 45/72+20/70 15/72+60/70 75/72+20/70