Add 18/20 and 45/70
18/20 + 45/70 is 54/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
45/70 = 45 × 2/70 × 2 = 90/140 - Add the two like fractions:
126/140 + 90/140 = 126 + 90/140 = 216/140 - 216/140 simplified gives 54/35
- So, 18/20 + 45/70 = 54/35
In mixed form: 119/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+45/70 18/20+90/70 18/40+45/70 54/20+45/70 18/60+45/70 90/20+45/70