Add 21/90 and 14/21
21/90 + 14/21 is 9/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
21/90 = 21 × 7/90 × 7 = 147/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
14/21 = 14 × 30/21 × 30 = 420/630 - Add the two like fractions:
147/630 + 420/630 = 147 + 420/630 = 567/630 - 567/630 simplified gives 9/10
- So, 21/90 + 14/21 = 9/10
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