Add 20/70 and 8/72
20/70 + 8/72 is 25/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 70 × 36 = 2520,
20/70 = 20 × 36/70 × 36 = 720/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
8/72 = 8 × 35/72 × 35 = 280/2520 - Add the two like fractions:
720/2520 + 280/2520 = 720 + 280/2520 = 1000/2520 - 1000/2520 simplified gives 25/63
- So, 20/70 + 8/72 = 25/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+8/72 20/70+16/72 60/70+8/72 20/70+24/72 20/70+40/72 20/70+56/72