the percent equation
posted by Fabian on .
1. find 30% 0f 70
2 what is 80% of 65
3 what percent of 56 is 14
4 36 is what percent of 40
5 80 is 40% of what number?
6 65% of what number is 78
7 what percent of 2000 is 6
8 12 is what percent of 4000
9 what percent of 3000 is 18
10 what is 110% of 80
11 find 180% of 160
12 4% if what number is 11
help please with any of these! :)

1.
0.23 * 70 = ?
3.
14 / 56 = ?
5.
0.4x = 80 
1.
Fine 30% of 70. The word of means multiply.
0.30 x 70 = 21
3. What percent of 56 is 14.
We don't know percent so we call it y. Remembering that of means multiply, we have y*56=14
solve for y. I get y = 14/56 = 0.25 as a decimal. You convert decimals to percents by multiplying by 100 (which is the same as moving the decimal to the right 2 places so 0.25 = 25%)
I think these two methods will solve most of the problems.
Check my work. I'm bad about typos. 
54 of 14

25%

hat percent of 130 liters is 1.95 liters? find the percent using the percent equation