Add 16/20 and 42/81
16/20 + 42/81 is 178/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
16/20 = 16 × 81/20 × 81 = 1296/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
42/81 = 42 × 20/81 × 20 = 840/1620 - Add the two like fractions:
1296/1620 + 840/1620 = 1296 + 840/1620 = 2136/1620 - 2136/1620 simplified gives 178/135
- So, 16/20 + 42/81 = 178/135
In mixed form: 143/135
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