Finding Fractions or Percentages of Numbers

Today we will look at finding fractions of numbers.

If we want to find 1/2 of 10 we just divide by 2
If we want to find 1/4 of 8 we divide by 4
If we want to find 1/10 of 20 we divide by 10

But what if we want to find 3/10 of 20?

First we divide by 10, then we multiply by 3

Solve these sums, note that questions 6 to 10 require you to add or multiply decimal numbers:

1) 3/4 of 8 =                                 6) 3/10 of 15 =
2) 4/5 of 15 =                               7) 4/10 of 23 =
3) 5/6 of 24 =                               8) 11/100 of 200 =
4) 7/8 of 80 =                               9) 7/100 of 120 =
5) 2/3 of 18 =                              10) 14/100 of 50 =

You can practice more of these questions here

Questions 8,9 & 10 are fractions over 100.  11/100 also means 11%

So, 11/100 of 200 is the same as 11% of 200

Now find the answer to these questions:
11) 10% of 150                           16) 12% of 1200
12) 20% of 200                           17) 15% of 300
13) 25% of 100                           18) 90% of 900
14) 30% of 150                           19) 17% of 200
15) 40% of 200                           20) 36% of 500

And, of course, you can have percentages more than 100
If 100% of 10 is 10, then 200% of 10 is 20
Find the answers to these questions
21) 200% of 17
22) 150% of 20
23) 250% of 50
24) 300% of 120
25) 1000% of 52.5

Socrative Quiz

Fraction Bingo