Add 20/84 and 7/90
20/84 + 7/90 is 199/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
20/84 = 20 × 15/84 × 15 = 300/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
7/90 = 7 × 14/90 × 14 = 98/1260 - Add the two like fractions:
300/1260 + 98/1260 = 300 + 98/1260 = 398/1260 - 398/1260 simplified gives 199/630
- So, 20/84 + 7/90 = 199/630
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