Add 90/70 and 42/49
1st number: 1 20/70, 2nd number: 42/49
90/70 + 42/49 is 15/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 49 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 70 × 7 = 490,
90/70 = 90 × 7/70 × 7 = 630/490 - Likewise, for the 2nd fraction, since 49 × 10 = 490,
42/49 = 42 × 10/49 × 10 = 420/490 - Add the two like fractions:
630/490 + 420/490 = 630 + 420/490 = 1050/490 - 1050/490 simplified gives 15/7
- So, 90/70 + 42/49 = 15/7
In mixed form: 21/7
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