Add 63/72 and 18/70
63/72 + 18/70 is 317/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
63/72 = 63 × 35/72 × 35 = 2205/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
18/70 = 18 × 36/70 × 36 = 648/2520 - Add the two like fractions:
2205/2520 + 648/2520 = 2205 + 648/2520 = 2853/2520 - 2853/2520 simplified gives 317/280
- So, 63/72 + 18/70 = 317/280
In mixed form: 137/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/72+36/70 63/72+54/70 63/72+90/70