Add 20/90 and 81/7
1st number: 20/90, 2nd number: 11 4/7
20/90 + 81/7 is 743/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 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 7 × 90 = 630,
81/7 = 81 × 90/7 × 90 = 7290/630 - Add the two like fractions:
140/630 + 7290/630 = 140 + 7290/630 = 7430/630 - 7430/630 simplified gives 743/63
- So, 20/90 + 81/7 = 743/63
In mixed form: 1150/63
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