Add 15/20 and 10/40
15/20 + 10/40 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
15/20 = 15 × 2/20 × 2 = 30/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
10/40 = 10 × 1/40 × 1 = 10/40 - Add the two like fractions:
30/40 + 10/40 = 30 + 10/40 = 40/40 - 40/40 simplified gives 1/1
- So, 15/20 + 10/40 = 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20+10/40 15/20+20/40 15/40+10/40 15/20+10/80 45/20+10/40 15/20+30/40 15/60+10/40 75/20+10/40 15/20+50/40 15/20+70/40