one strate a) 12 is 40% of what number? b) 128 is 40% of what number? c) 240 is 150% of what number? d) 588 is 98% of what number?

Answers

Answers as follows: a) 30 b) 320 c) 160 d) 600

Step by step:

* is means equal * of means multiply * what number is represented by “x” * rule for changing percent to decimal is to move the decimal point 2 places to the left.

a) 12 is 40% of what number? 12=.40 x solve for x by dividing both sides by .40 30=x

b) 128 is 40% of what number? 128 = .40 x Solve for x by dividing both sides by .40 320 = x

c) 240 is 150% of what number? 240 = 1.50 x Solve for x by dividing both sides by 1.50 160 = x

d) 588 is 98% of what number? 588 = .98 x Solve for x by dividing both sides by .98 600 = x

Answers as follows:

a) 30

b) 320

c) 160

d) 600

Step by step:

* is means equal

* of means multiply

* what number is represented by “x”

* rule for changing percent to decimal is to move the decimal point 2 places to the left.

a) 12 is 40% of what number?

12=.40 x

solve for x by dividing both sides by .40

30=x

b) 128 is 40% of what number?

128 = .40 x

Solve for x by dividing both sides by .40

320 = x

c) 240 is 150% of what number?

240 = 1.50 x

Solve for x by dividing both sides by 1.50

160 = x

d) 588 is 98% of what number?

588 = .98 x

Solve for x by dividing both sides by .98

600 = x