Add 7/81 and 4/40
7/81 + 4/40 is 151/810.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 40 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 81 × 40 = 3240,
7/81 = 7 × 40/81 × 40 = 280/3240 - Likewise, for the 2nd fraction, since 40 × 81 = 3240,
4/40 = 4 × 81/40 × 81 = 324/3240 - Add the two like fractions:
280/3240 + 324/3240 = 280 + 324/3240 = 604/3240 - 604/3240 simplified gives 151/810
- So, 7/81 + 4/40 = 151/810
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