Add 20/75 and 10/90
20/75 + 10/90 is 17/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
20/75 = 20 × 6/75 × 6 = 120/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
10/90 = 10 × 5/90 × 5 = 50/450 - Add the two like fractions:
120/450 + 50/450 = 120 + 50/450 = 170/450 - 170/450 simplified gives 17/45
- So, 20/75 + 10/90 = 17/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/75+10/90 20/75+20/90 60/75+10/90 20/75+30/90 20/75+50/90 20/75+70/90