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# Answer to questions of percentage, discount and primer facto

Exercises

1. Solve the following problems with integers
a. 31+(-18)
b. (-8)+14+5
c. 7Ã-(-13)
d. (-125)÷(-5)

2. Solve the following problems with fractions:
a. 3/7 + 2/7
b. 5/8 - 1/4
c. 4/9 + 1/11
c. 1+ 4/7- 3/4

3. Solve the following problems with decimals
a. 3.11-4.5
b. 5.27*(-5.81)
c. 11.3/2.2

4. Write the answers in 3 as percentages.

5. What is 15% of 35?

6. Solve the following problem keeping in mind the correct order of operations:
(1+4)*(5+1.1)/3+1

7. What are the prime factors of number 50? What about 51?

8. You buy \$128.95 worth of merchandise. How much is taken off the normal price when it is sold at a 10% discount? How much do you end up paying with this 10% discount?

#### Solution Preview

Q1
a. 31+(-18)=13

b. (-8)+14+5=19-8=11

c. 7Ã-(-13)=-91

d. (-125)÷(-5) =25.

Q2:
a. 3/7 + 2/7=5/7

b. 5/8 - 1/4=5/8-2/8=3/8

c. 4/9 + 1/11=44/99+9/99=53/99

c. 1+ 4/7- 3/4 ...

#### Solution Summary

The solution provides detailed explanation how to solve questions related to percentage, discount and primer factor.

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