Given numbers are decimal fractions. Make the number of decimal places in all the given numbers the same i.e., 0.36, 0.48, 0.72 and 2.40 this they become36, 48, 72, 240 (multiply all by 100) HCF of 36,48,72,240,=1Previously we multiplied the given numbers by 100. Now to get the answer divide the obtained HCF by 12 HCF of 0.36,0.48,0.72 and 2.4= 0.12
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