Add 18/30 and 10/40
18/30 + 10/40 is 17/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
18/30 = 18 × 4/30 × 4 = 72/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
10/40 = 10 × 3/40 × 3 = 30/120 - Add the two like fractions:
72/120 + 30/120 = 72 + 30/120 = 102/120 - 102/120 simplified gives 17/20
- So, 18/30 + 10/40 = 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30+10/40 18/30+20/40 18/60+10/40 18/30+10/80 54/30+10/40 18/30+30/40 18/90+10/40 90/30+10/40 18/30+50/40 18/30+70/40