Add 20/80 and 42/45
20/80 + 42/45 is 71/60.
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,
20/80 = 20 × 9/80 × 9 = 180/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
42/45 = 42 × 16/45 × 16 = 672/720 - Add the two like fractions:
180/720 + 672/720 = 180 + 672/720 = 852/720 - 852/720 simplified gives 71/60
- So, 20/80 + 42/45 = 71/60
In mixed form: 111/60
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