Add 84/90 and 42/70
84/90 + 42/70 is 23/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
84/90 = 84 × 7/90 × 7 = 588/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
42/70 = 42 × 9/70 × 9 = 378/630 - Add the two like fractions:
588/630 + 378/630 = 588 + 378/630 = 966/630 - 966/630 simplified gives 23/15
- So, 84/90 + 42/70 = 23/15
In mixed form: 18/15
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