Add 12/21 and 9/90
12/21 + 9/90 is 47/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
12/21 = 12 × 30/21 × 30 = 360/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
9/90 = 9 × 7/90 × 7 = 63/630 - Add the two like fractions:
360/630 + 63/630 = 360 + 63/630 = 423/630 - 423/630 simplified gives 47/70
- So, 12/21 + 9/90 = 47/70
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