Add 15/70 and 70/84
15/70 + 70/84 is 22/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
15/70 = 15 × 6/70 × 6 = 90/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
70/84 = 70 × 5/84 × 5 = 350/420 - Add the two like fractions:
90/420 + 350/420 = 90 + 350/420 = 440/420 - 440/420 simplified gives 22/21
- So, 15/70 + 70/84 = 22/21
In mixed form: 11/21
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