Add 40/21 and 45/7, Solve 1 19/21 + 6 3/7 as a fraction

Add 40/21 and 45/7

1^st number: 1 19/21, 2^nd number: 6 3/7

40/21 + 45/7 is 25/3.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21

Next, find the equivalent fraction of both fractional numbers with denominator 21
For the 1st fraction, since 21 × 1 = 21,
40/21 = 40 × 1/21 × 1 = 40/21
Likewise, for the 2nd fraction, since 7 × 3 = 21,
45/7 = 45 × 3/7 × 3 = 135/21
Add the two like fractions:
40/21 + 135/21 = 40 + 135/21 = 175/21
175/21 simplified gives 25/3
So, 40/21 + 45/7 = 25/3
In mixed form: 81/3

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