You can check whether the ratios form a proportion by comparing the ratios in their simplest form.
Yes.
Practice makes perfect
Recall that ratios form a proportion when the ratios are equivalent. Thus, to determine if the given ratios are equivalent, we will rewrite the ratios in their simplest form. If the resultant ratios are equivalent, then the ratios form a proportion. From here, since 53 is in its simplest form, we will simplify 3521.
35/21=35÷7/21÷7=5/3
Because the resultant ratio and 53 are equivalent, 53 and 3521 form a proportion.
