Add 15/90 and 90/7, Solve 15/90 + 12 6/7 as a fraction

Add 15/90 and 90/7

1^st number: 15/90, 2^nd number: 12 6/7

15/90 + 90/7 is 547/42.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630
Likewise, for the 2nd fraction, since 7 × 90 = 630,
90/7 = 90 × 90/7 × 90 = 8100/630
Add the two like fractions:
105/630 + 8100/630 = 105 + 8100/630 = 8205/630
8205/630 simplified gives 547/42
So, 15/90 + 90/7 = 547/42
In mixed form: 131/42

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