Answer
B is greater
Work Step by Step
If 150% of A is B, then B is more than one whole part (100%) of A. This means B is greater.
For example, let A=100.
$150\%(A)=B\longrightarrow$ convert percent to decimal by moving decimal 2 places left
$1.5A=B\longrightarrow$ substitute for A
$1.5(100)=B\longrightarrow$ multiply
$150=B$
$100\lt150$, so B is greater.
