What is 10 decreased by 80%?

10 decreased by 80% is 2.

Since, 20% is left to make 100%, you have to find 20% of 10 which  is 8.

Subtract 8 from 10 and you get 2.

Hope it helps

step-by-step explanation:

see if this :

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents