6th Grade Percent as a Rate per 100 Quiz: 10 Questions with Explanations

A 4.5%B 45%C 55%D 0.45%

45 of 100 squares are shaded, so 45%. 55% would be the unshaded part.

A 25B 55C 20D 2

25% = 1/4, so \(80 \div 4 = 20\). Subtracting 25 gives 55, which is not a percent.

A 6/5B 3/5C 3/10D 60/10

60% = 60/\(100 = 3\)/5. 6/5 is 120% and 3/10 is 30%.

A $12B $10C $37D $28

Discount = \(0.30 \times 40 = \$12\), so \(\$40 – \$12 = \$28\). $12 is only the discount.

A 3B 30C 300D 75

20% = 1/5, so \(15 \times 5 = 75\). Dividing 15 by 5 (3) finds 20% of 15.

A 18%B 90%C 80%D 10%

18/\(20 = 90\)/\(100 = 90\)%. The 10% is the percent she got wrong.

A $3B $6C $30D $0.30

\(0.06 \times 50 = 3\).

A 30% of 80B 25% of 100C 60% of 50D 10% of 200

60% of \(50 = 30\); 30% of \(80 = 24\); 25% of \(100 = 25\); 10% of \(200 = 20\).

A 840B 84C 8,400D 2,365

\(0.35 \times 2,400 = 840\). Adding 35 to 2,400 would be wrong.

A 30B 15C 3D 170

150% = 1.5, so \(1.5 \times 20 = 30\). A percent over 100 gives more than the original amount.