Add 18/70 and 80/90
18/70 + 80/90 is 361/315.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
18/70 = 18 × 9/70 × 9 = 162/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
80/90 = 80 × 7/90 × 7 = 560/630 - Add the two like fractions:
162/630 + 560/630 = 162 + 560/630 = 722/630 - 722/630 simplified gives 361/315
- So, 18/70 + 80/90 = 361/315
In mixed form: 146/315
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