In the top portion of the circle, write the word part (P). In the lower left
portion of the circle, write the word rate (R), and in the lower right portion,
write the word base (B). Put a multiplication sign between the two lower
portions and a division sign between the top and bottom portions.
If you are asked to find the part (P), place the rate (R) in the lower left
portion of the circle and the base (B) in the lower right portion. The circle
tells you to use the formulaP¼RBand multiply.
If you are asked to find the rate (R), place the part (P) in the top portion of
the circle and the base (B) in the lower right portion. The circle tells you to
use the formulaR¼PBand divide. The answer will be in decimal form and
needs to be changed to a percent.
If you are asked to find the base (B), place the part (P) in the top portion
and the rate (R) in the bottom left portion. The circle tells you to use the
formulaB¼PRand divide. See Figure RIII-2.Be sure to change the percent
to a decimal or fraction before multiplying or dividing.Fig. RIII-1.Fig. RIII-2.38 REFRESHER III Percents