Add 42/90 and 45/80
42/90 + 45/80 is 247/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
42/90 = 42 × 8/90 × 8 = 336/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
45/80 = 45 × 9/80 × 9 = 405/720 - Add the two like fractions:
336/720 + 405/720 = 336 + 405/720 = 741/720 - 741/720 simplified gives 247/240
- So, 42/90 + 45/80 = 247/240
In mixed form: 17/240
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