Add 28/7 and 90/8, Solve 4 0/7 + 11 2/8 as a fraction

Add 28/7 and 90/8

1^st number: 4 0/7, 2^nd number: 11 2/8

28/7 + 90/8 is 61/4.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56

Next, find the equivalent fraction of both fractional numbers with denominator 56
For the 1st fraction, since 7 × 8 = 56,
28/7 = 28 × 8/7 × 8 = 224/56
Likewise, for the 2nd fraction, since 8 × 7 = 56,
90/8 = 90 × 7/8 × 7 = 630/56
Add the two like fractions:
224/56 + 630/56 = 224 + 630/56 = 854/56
854/56 simplified gives 61/4
So, 28/7 + 90/8 = 61/4
In mixed form: 151/4

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