Add 90/70 and 2/72
1st number: 1 20/70, 2nd number: 2/72
90/70 + 2/72 is 331/252.
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,
90/70 = 90 × 36/70 × 36 = 3240/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
2/72 = 2 × 35/72 × 35 = 70/2520 - Add the two like fractions:
3240/2520 + 70/2520 = 3240 + 70/2520 = 3310/2520 - 3310/2520 simplified gives 331/252
- So, 90/70 + 2/72 = 331/252
In mixed form: 179/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+4/72 90/70+6/72 90/70+10/72 90/70+14/72