Add 2/21 and 42/80
2/21 + 42/80 is 521/840.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
2/21 = 2 × 80/21 × 80 = 160/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
42/80 = 42 × 21/80 × 21 = 882/1680 - Add the two like fractions:
160/1680 + 882/1680 = 160 + 882/1680 = 1042/1680 - 1042/1680 simplified gives 521/840
- So, 2/21 + 42/80 = 521/840
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