Add 10/70 and 30/90
10/70 + 30/90 is 10/21.
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,
10/70 = 10 × 9/70 × 9 = 90/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
30/90 = 30 × 7/90 × 7 = 210/630 - Add the two like fractions:
90/630 + 210/630 = 90 + 210/630 = 300/630 - 300/630 simplified gives 10/21
- So, 10/70 + 30/90 = 10/21
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