Add 21/40 and 24/21
1st number: 21/40, 2nd number: 1 3/21
21/40 + 24/21 is 467/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
21/40 = 21 × 21/40 × 21 = 441/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
24/21 = 24 × 40/21 × 40 = 960/840 - Add the two like fractions:
441/840 + 960/840 = 441 + 960/840 = 1401/840 - 1401/840 simplified gives 467/280
- So, 21/40 + 24/21 = 467/280
In mixed form: 1187/280
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