Add 45/80 and 45/90
45/80 + 45/90 is 17/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
45/80 = 45 × 9/80 × 9 = 405/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
45/90 = 45 × 8/90 × 8 = 360/720 - Add the two like fractions:
405/720 + 360/720 = 405 + 360/720 = 765/720 - 765/720 simplified gives 17/16
- So, 45/80 + 45/90 = 17/16
In mixed form: 11/16
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Related: 90/80+45/90