Add 54/84 and 21/80
54/84 + 21/80 is 507/560.
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,
54/84 = 54 × 20/84 × 20 = 1080/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
21/80 = 21 × 21/80 × 21 = 441/1680 - Add the two like fractions:
1080/1680 + 441/1680 = 1080 + 441/1680 = 1521/1680 - 1521/1680 simplified gives 507/560
- So, 54/84 + 21/80 = 507/560
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