Add 90/60 and 81/72, Solve 1 30/60 + 1 9/72 as a fraction

Add 90/60 and 81/72

1^st number: 1 30/60, 2^nd number: 1 9/72

90/60 + 81/72 is 21/8.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 72 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 60 × 6 = 360,
90/60 = 90 × 6/60 × 6 = 540/360
Likewise, for the 2nd fraction, since 72 × 5 = 360,
81/72 = 81 × 5/72 × 5 = 405/360
Add the two like fractions:
540/360 + 405/360 = 540 + 405/360 = 945/360
945/360 simplified gives 21/8
So, 90/60 + 81/72 = 21/8
In mixed form: 25/8

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