What Is 45% of 40?

45% of 40 is 18, the same as 9/20 of 40.

Result

Answer

18

45% of 40 is 18.

  • 40 + 45%: 58
  • 40 − 45%: 22
1845% of 40

Step-by-step solution

The problem

{45}\% \text{ of } {40}

  1. Change 45% to a decimal. Divide by 100.

    45\% = 45 \div 100 = 0.45
    = \textcolor{#0b5c56}{0.45} \times 40

  2. Multiply. Leave out the decimal points and multiply, then put the point back. Count the decimal places: 0.45 has 2, so the answer has 2.

    \begin{aligned} 45 \times 40 &= 1800 \\[10pt] 1800 \div 100 &= 18 \end{aligned}
    = \textcolor{#0b5c56}{18}

All the working together

\begin{aligned} &{45}\% \text{ of } {40} \\[8pt] &= 0.45 \times 40 && \textcolor{#5b6660}{\textsf{percent → decimal}} \\[8pt] &= \textcolor{#0b5c56}{18} && \textcolor{#5b6660}{\textsf{multiply}}\end{aligned}
What is % of ?

45% of 40 at a glance

45% of 4018
45% as a fraction9/20
40 + 45%58
40 − 45%22

45% of other numbers

QuestionAnswer
45% of 104.5
45% of 156.75
45% of 209
45% of 2511.25
45% of 3013.5
45% of 4018
45% of 5022.5
45% of 6027
45% of 7031.5
45% of 7533.75
45% of 8036
45% of 9040.5
45% of 10045
45% of 12054
45% of 15067.5
45% of 20090
45% of 250112.5
45% of 300135
45% of 500225
45% of 1000450

Other percents of 40

QuestionAnswer
1% of 400.4
2% of 400.8
5% of 402
10% of 404
12% of 404.8
15% of 406
18% of 407.2
20% of 408
25% of 4010
30% of 4012
33% of 4013.2
35% of 4014
40% of 4016
45% of 4018
50% of 4020
60% of 4024
70% of 4028
75% of 4030
80% of 4032
90% of 4036

Frequently asked questions

What is 45% of 40?

45% of 40 is 18: change 45% to a decimal (0.45) and multiply by 40.

What is 40 plus 45%?

40 increased by 45% is 58 (40 + 18).

What is 40 minus 45%?

40 decreased by 45% is 22 (40 − 18).

Any other percentage question – a part as a percent, percent change, percent difference: use the Percentage Calculator.