## Prealgebra (7th Edition)

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) $\frac{200}{300}\overset?=\frac{2}{3}$ $200\times3\overset?=300\times2$ $600\overset?=600\checkmark$