Add 70/63 and 90/84, Solve 1 7/63 + 1 6/84 as a fraction

Add 70/63 and 90/84

1^st number: 1 7/63, 2^nd number: 1 6/84

70/63 + 90/84 is 275/126.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 84 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 63 × 4 = 252,
70/63 = 70 × 4/63 × 4 = 280/252
Likewise, for the 2nd fraction, since 84 × 3 = 252,
90/84 = 90 × 3/84 × 3 = 270/252
Add the two like fractions:
280/252 + 270/252 = 280 + 270/252 = 550/252
550/252 simplified gives 275/126
So, 70/63 + 90/84 = 275/126
In mixed form: 223/126

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