Add 20/70 and 20/60
20/70 + 20/60 is 13/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
20/70 = 20 × 6/70 × 6 = 120/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
20/60 = 20 × 7/60 × 7 = 140/420 - Add the two like fractions:
120/420 + 140/420 = 120 + 140/420 = 260/420 - 260/420 simplified gives 13/21
- So, 20/70 + 20/60 = 13/21
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