Add 20/35 and 30/72
20/35 + 30/72 is 83/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 35 × 72 = 2520,
20/35 = 20 × 72/35 × 72 = 1440/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
30/72 = 30 × 35/72 × 35 = 1050/2520 - Add the two like fractions:
1440/2520 + 1050/2520 = 1440 + 1050/2520 = 2490/2520 - 2490/2520 simplified gives 83/84
- So, 20/35 + 30/72 = 83/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/35+30/72 20/35+60/72 20/70+30/72 60/35+30/72 20/35+90/72