Add 4/90 and 21/16, Solve 4/90 + 1 5/16 as a fraction

Add 4/90 and 21/16

1^st number: 4/90, 2^nd number: 1 5/16

4/90 + 21/16 is 977/720.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 16 is 720

Next, find the equivalent fraction of both fractional numbers with denominator 720
For the 1st fraction, since 90 × 8 = 720,
4/90 = 4 × 8/90 × 8 = 32/720
Likewise, for the 2nd fraction, since 16 × 45 = 720,
21/16 = 21 × 45/16 × 45 = 945/720
Add the two like fractions:
32/720 + 945/720 = 32 + 945/720 = 977/720
So, 4/90 + 21/16 = 977/720
In mixed form: 1257/720

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