Add 12/21 and 54/40
1st number: 12/21, 2nd number: 1 14/40
12/21 + 54/40 is 269/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
12/21 = 12 × 40/21 × 40 = 480/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
54/40 = 54 × 21/40 × 21 = 1134/840 - Add the two like fractions:
480/840 + 1134/840 = 480 + 1134/840 = 1614/840 - 1614/840 simplified gives 269/140
- So, 12/21 + 54/40 = 269/140
In mixed form: 1129/140
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