Add 4/21 and 10/90
4/21 + 10/90 is 19/63.
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,
4/21 = 4 × 30/21 × 30 = 120/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
10/90 = 10 × 7/90 × 7 = 70/630 - Add the two like fractions:
120/630 + 70/630 = 120 + 70/630 = 190/630 - 190/630 simplified gives 19/63
- So, 4/21 + 10/90 = 19/63
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