Add 42/75 and 20/72
42/75 + 20/72 is 377/450.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 72 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 75 × 24 = 1800,
42/75 = 42 × 24/75 × 24 = 1008/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
20/72 = 20 × 25/72 × 25 = 500/1800 - Add the two like fractions:
1008/1800 + 500/1800 = 1008 + 500/1800 = 1508/1800 - 1508/1800 simplified gives 377/450
- So, 42/75 + 20/72 = 377/450
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/75+20/72 42/75+40/72 42/75+60/72