Add 9/72 and 42/70
9/72 + 42/70 is 29/40.
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,
9/72 = 9 × 35/72 × 35 = 315/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
42/70 = 42 × 36/70 × 36 = 1512/2520 - Add the two like fractions:
315/2520 + 1512/2520 = 315 + 1512/2520 = 1827/2520 - 1827/2520 simplified gives 29/40
- So, 9/72 + 42/70 = 29/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/72+42/70 9/72+84/70 27/72+42/70 45/72+42/70 63/72+42/70