Add 20/90 and 3/21
20/90 + 3/21 is 23/63.
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,
20/90 = 20 × 7/90 × 7 = 140/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
3/21 = 3 × 30/21 × 30 = 90/630 - Add the two like fractions:
140/630 + 90/630 = 140 + 90/630 = 230/630 - 230/630 simplified gives 23/63
- So, 20/90 + 3/21 = 23/63
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