Add 12/80 and 42/45
12/80 + 42/45 is 13/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
12/80 = 12 × 9/80 × 9 = 108/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
42/45 = 42 × 16/45 × 16 = 672/720 - Add the two like fractions:
108/720 + 672/720 = 108 + 672/720 = 780/720 - 780/720 simplified gives 13/12
- So, 12/80 + 42/45 = 13/12
In mixed form: 11/12
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