Add 3/40 and 25/21, Solve 3/40 + 1 4/21 as a fraction

Add 3/40 and 25/21

1^st number: 3/40, 2^nd number: 1 4/21

3/40 + 25/21 is 1063/840.

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,
3/40 = 3 × 21/40 × 21 = 63/840
Likewise, for the 2nd fraction, since 21 × 40 = 840,
25/21 = 25 × 40/21 × 40 = 1000/840
Add the two like fractions:
63/840 + 1000/840 = 63 + 1000/840 = 1063/840
So, 3/40 + 25/21 = 1063/840
In mixed form: 1223/840

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