To solve this type of problems we have to follow the below steps.
Step I: Convert each of the decimals to like decimals.
Step II: Remove the decimal point and find the least common multiple (LCM) as usual.
Step III: In the LCM, put the decimal point as there are a number of decimal places in the like decimals.
LCM of 3.2, 2.72, 1.28 and 1.44
Step I: Like decimals are 3.2, 2.72, 1.28 and 1.44
Step II: LCM of 32/10, 272/100, 128/100 and 144/100 = LCM(32, 272, 128, 144) = 97920
Step III: LCM of 3.2, 2.72, 1.28, 1.44 = 979.20
∴ LCM of 3.2, 2.72, 1.28, 1.44 = 979.20
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