Find :
$$\cfrac{7}{50}$$ of $$1000$$
$$1000$$ can also be written as $$\cfrac{1000}{1}$$
$$\therefore$$ We have:
$$\cfrac{7}{50}$$ of $$\cfrac{1000}{1}$$
This can be written as,
$$\cfrac{7}{50}\times \cfrac{1000}{1}$$
By the rule Multiplication of fraction,
Product of fraction=$$\cfrac{product\ of\ numerator}{product\ of\ denominator}$$
So,
$$\cfrac{7}{50}\times \cfrac{1000}{1}=\cfrac{(7\times 1000)}{(50\times 1)}$$
$$=\cfrac{(7\times 20)}{(1\times 1)}$$
$$=140$$