Add 18/70 and 54/72
18/70 + 54/72 is 141/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 70 × 36 = 2520,
18/70 = 18 × 36/70 × 36 = 648/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
54/72 = 54 × 35/72 × 35 = 1890/2520 - Add the two like fractions:
648/2520 + 1890/2520 = 648 + 1890/2520 = 2538/2520 - 2538/2520 simplified gives 141/140
- So, 18/70 + 54/72 = 141/140
In mixed form: 11/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70+54/72 54/70+54/72 90/70+54/72