Add 21/40 and 98/30, Solve 21/40 + 3 8/30 as a fraction

Add 21/40 and 98/30

1^st number: 21/40, 2^nd number: 3 8/30

21/40 + 98/30 is 91/24.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120
Likewise, for the 2nd fraction, since 30 × 4 = 120,
98/30 = 98 × 4/30 × 4 = 392/120
Add the two like fractions:
63/120 + 392/120 = 63 + 392/120 = 455/120
455/120 simplified gives 91/24
So, 21/40 + 98/30 = 91/24
In mixed form: 319/24

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