Add 20/90 and 9/70
20/90 + 9/70 is 221/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 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 70 × 9 = 630,
9/70 = 9 × 9/70 × 9 = 81/630 - Add the two like fractions:
140/630 + 81/630 = 140 + 81/630 = 221/630 - So, 20/90 + 9/70 = 221/630
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