Add 12/72 and 45/70
12/72 + 45/70 is 17/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
12/72 = 12 × 35/72 × 35 = 420/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
45/70 = 45 × 36/70 × 36 = 1620/2520 - Add the two like fractions:
420/2520 + 1620/2520 = 420 + 1620/2520 = 2040/2520 - 2040/2520 simplified gives 17/21
- So, 12/72 + 45/70 = 17/21
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