Add 20/70 and 20/90
20/70 + 20/90 is 32/63.
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,
20/70 = 20 × 9/70 × 9 = 180/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
20/90 = 20 × 7/90 × 7 = 140/630 - Add the two like fractions:
180/630 + 140/630 = 180 + 140/630 = 320/630 - 320/630 simplified gives 32/63
- So, 20/70 + 20/90 = 32/63
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