Add 10/84 and 20/70
10/84 + 20/70 is 17/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
10/84 = 10 × 5/84 × 5 = 50/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
20/70 = 20 × 6/70 × 6 = 120/420 - Add the two like fractions:
50/420 + 120/420 = 50 + 120/420 = 170/420 - 170/420 simplified gives 17/42
- So, 10/84 + 20/70 = 17/42
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