Add 90/70 and 84/45
1st number: 1 20/70, 2nd number: 1 39/45
90/70 + 84/45 is 331/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
90/70 = 90 × 9/70 × 9 = 810/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
84/45 = 84 × 14/45 × 14 = 1176/630 - Add the two like fractions:
810/630 + 1176/630 = 810 + 1176/630 = 1986/630 - 1986/630 simplified gives 331/105
- So, 90/70 + 84/45 = 331/105
In mixed form: 316/105
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