Add 20/50 and 42/72
20/50 + 42/72 is 59/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 72 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 50 × 36 = 1800,
20/50 = 20 × 36/50 × 36 = 720/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
42/72 = 42 × 25/72 × 25 = 1050/1800 - Add the two like fractions:
720/1800 + 1050/1800 = 720 + 1050/1800 = 1770/1800 - 1770/1800 simplified gives 59/60
- So, 20/50 + 42/72 = 59/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/50+42/72 20/50+84/72 60/50+42/72