Add 80/90 and 18/70
80/90 + 18/70 is 361/315.
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,
80/90 = 80 × 7/90 × 7 = 560/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
18/70 = 18 × 9/70 × 9 = 162/630 - Add the two like fractions:
560/630 + 162/630 = 560 + 162/630 = 722/630 - 722/630 simplified gives 361/315
- So, 80/90 + 18/70 = 361/315
In mixed form: 146/315
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