Add 20/75 and 15/40
20/75 + 15/40 is 77/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 40 is 600
Next, find the equivalent fraction of both fractional numbers with denominator 600 - For the 1st fraction, since 75 × 8 = 600,
20/75 = 20 × 8/75 × 8 = 160/600 - Likewise, for the 2nd fraction, since 40 × 15 = 600,
15/40 = 15 × 15/40 × 15 = 225/600 - Add the two like fractions:
160/600 + 225/600 = 160 + 225/600 = 385/600 - 385/600 simplified gives 77/120
- So, 20/75 + 15/40 = 77/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/75+15/40 20/75+30/40 20/75+15/80 60/75+15/40 20/75+45/40 20/75+75/40