We want to estimate 224 % of 320. We will start by rounding the percent.
rcl
224 % & ≈ & 225 %Let's find 225 % of 320 to get an estimation. To do so, we can rewrite 225 % of 320 as the sum of 200 % of 320 and 25 % of 320.
rcl
225 %of 320 & = & ( 200 %of 320) + ( 25 %of 320) [0.4em]
& = & ( 200 %* 320) + ( 25 %* 320)
Finally, we will evaluate the expression that we got. Notice that 200 %= 2 and 25 %= 14.
