Add 1/42 and 42/40, Solve 1/42 + 1 2/40 as a fraction

Add 1/42 and 42/40

1^st number: 1/42, 2^nd number: 1 2/40

1/42 + 42/40 is 451/420.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 42 × 20 = 840,
1/42 = 1 × 20/42 × 20 = 20/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
42/40 = 42 × 21/40 × 21 = 882/840
Add the two like fractions:
20/840 + 882/840 = 20 + 882/840 = 902/840
902/840 simplified gives 451/420
So, 1/42 + 42/40 = 451/420
In mixed form: 131/420

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