Answer
a) equivalent
b) equivalent
c) not equivalent
d) equivalent
Work Step by Step
Cross multiply to find if equivalent.
a)
$\frac{10}{15}\overset?=\frac{2}{3}$
$10\times3\overset?=15\times2$
$30\overset?=30\checkmark$
b)
$\frac{40}{60}\overset?=\frac{2}{3}$
$40\times3\overset?=60\times2$
$120\overset?=120\checkmark$
c)
$\frac{16}{20}\overset?=\frac{2}{3}$
$16\times3\overset?=20\times2$
$48\overset?=40\ X$
d)
$\frac{200}{300}\overset?=\frac{2}{3}$
$200\times3\overset?=300\times2$
$600\overset?=600\checkmark$
