Add 81/72 and 84/70
1st number: 1 9/72, 2nd number: 1 14/70
81/72 + 84/70 is 93/40.
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,
81/72 = 81 × 35/72 × 35 = 2835/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
84/70 = 84 × 36/70 × 36 = 3024/2520 - Add the two like fractions:
2835/2520 + 3024/2520 = 2835 + 3024/2520 = 5859/2520 - 5859/2520 simplified gives 93/40
- So, 81/72 + 84/70 = 93/40
In mixed form: 213/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: