Add 70/15 and 21/84
1st number: 4 10/15, 2nd number: 21/84
70/15 + 21/84 is 59/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
70/15 = 70 × 28/15 × 28 = 1960/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Add the two like fractions:
1960/420 + 105/420 = 1960 + 105/420 = 2065/420 - 2065/420 simplified gives 59/12
- So, 70/15 + 21/84 = 59/12
In mixed form: 411/12
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