Add 15/70 and 70/72
15/70 + 70/72 is 299/252.
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,
15/70 = 15 × 36/70 × 36 = 540/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
70/72 = 70 × 35/72 × 35 = 2450/2520 - Add the two like fractions:
540/2520 + 2450/2520 = 540 + 2450/2520 = 2990/2520 - 2990/2520 simplified gives 299/252
- So, 15/70 + 70/72 = 299/252
In mixed form: 147/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/70+70/72 45/70+70/72 75/70+70/72