Add 1/70 and 3/90
1/70 + 3/90 is 1/21.
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,
1/70 = 1 × 9/70 × 9 = 9/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
3/90 = 3 × 7/90 × 7 = 21/630 - Add the two like fractions:
9/630 + 21/630 = 9 + 21/630 = 30/630 - 30/630 simplified gives 1/21
- So, 1/70 + 3/90 = 1/21
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