Add 30/70 and 40/60
30/70 + 40/60 is 23/21.
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,
30/70 = 30 × 6/70 × 6 = 180/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
40/60 = 40 × 7/60 × 7 = 280/420 - Add the two like fractions:
180/420 + 280/420 = 180 + 280/420 = 460/420 - 460/420 simplified gives 23/21
- So, 30/70 + 40/60 = 23/21
In mixed form: 12/21
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