Add 18/84 and 40/80
18/84 + 40/80 is 5/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 84 × 20 = 1680,
18/84 = 18 × 20/84 × 20 = 360/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
40/80 = 40 × 21/80 × 21 = 840/1680 - Add the two like fractions:
360/1680 + 840/1680 = 360 + 840/1680 = 1200/1680 - 1200/1680 simplified gives 5/7
- So, 18/84 + 40/80 = 5/7
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