Add 1/84 and 84/90
1/84 + 84/90 is 397/420.
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,
1/84 = 1 × 15/84 × 15 = 15/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
84/90 = 84 × 14/90 × 14 = 1176/1260 - Add the two like fractions:
15/1260 + 1176/1260 = 15 + 1176/1260 = 1191/1260 - 1191/1260 simplified gives 397/420
- So, 1/84 + 84/90 = 397/420
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