Find the LCM of 1.05 and 2.1.
1.05 and 2.1
no. = $$\frac{105}{100}$$ and  $$\frac{21}{10}$$
105=$$5\times 3\times 7$$
21=$$3\times 7$$
Select the common terms
lcm= $$3\times 7\times 5 =105$$
denominator is calculated by hcf method
100 = $$2\times 2\times5\times 5$$
10 =$$2\times 5$$
select the highest common factor = 10
lcm = $$\frac{lcm}{hcf}$$
$$\frac{105}{10}$$
=21
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