Add 9/42 and 45/80
9/42 + 45/80 is 87/112.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
9/42 = 9 × 40/42 × 40 = 360/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
45/80 = 45 × 21/80 × 21 = 945/1680 - Add the two like fractions:
360/1680 + 945/1680 = 360 + 945/1680 = 1305/1680 - 1305/1680 simplified gives 87/112
- So, 9/42 + 45/80 = 87/112
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