Add 15/70 and 84/72
1st number: 15/70, 2nd number: 1 12/72
15/70 + 84/72 is 29/21.
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,
84/72 = 84 × 35/72 × 35 = 2940/2520 - Add the two like fractions:
540/2520 + 2940/2520 = 540 + 2940/2520 = 3480/2520 - 3480/2520 simplified gives 29/21
- So, 15/70 + 84/72 = 29/21
In mixed form: 18/21
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