Add 40/45 and 30/80
40/45 + 30/80 is 91/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
40/45 = 40 × 16/45 × 16 = 640/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
30/80 = 30 × 9/80 × 9 = 270/720 - Add the two like fractions:
640/720 + 270/720 = 640 + 270/720 = 910/720 - 910/720 simplified gives 91/72
- So, 40/45 + 30/80 = 91/72
In mixed form: 119/72
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