Add 1/42 and 20/90
1/42 + 20/90 is 31/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
1/42 = 1 × 15/42 × 15 = 15/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
20/90 = 20 × 7/90 × 7 = 140/630 - Add the two like fractions:
15/630 + 140/630 = 15 + 140/630 = 155/630 - 155/630 simplified gives 31/126
- So, 1/42 + 20/90 = 31/126
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