Add 28/72 and 45/70
28/72 + 45/70 is 65/63.
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,
28/72 = 28 × 35/72 × 35 = 980/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
45/70 = 45 × 36/70 × 36 = 1620/2520 - Add the two like fractions:
980/2520 + 1620/2520 = 980 + 1620/2520 = 2600/2520 - 2600/2520 simplified gives 65/63
- So, 28/72 + 45/70 = 65/63
In mixed form: 12/63
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