What Is 10% of 40?

10% of 40 is 4, the same as 1/10 of 40.

Result

Answer

4

10% of 40 is 4.

  • 40 + 10%: 44
  • 40 − 10%: 36
410% of 40

Step-by-step solution

The problem

{10}\% \text{ of } {40}

  1. Change 10% to a decimal. Divide by 100.

    10\% = 10 \div 100 = 0.1
    = \textcolor{#0b5c56}{0.1} \times 40

  2. Multiply. Leave out the decimal points and multiply, then put the point back. Count the decimal places: 0.1 has 1, so the answer has 1.

    \begin{aligned} 1 \times 40 &= 40 \\[10pt] 40 \div 10 &= 4 \end{aligned}
    = \textcolor{#0b5c56}{4}

All the working together

\begin{aligned} &{10}\% \text{ of } {40} \\[8pt] &= 0.1 \times 40 && \textcolor{#5b6660}{\textsf{percent → decimal}} \\[8pt] &= \textcolor{#0b5c56}{4} && \textcolor{#5b6660}{\textsf{multiply}}\end{aligned}
What is % of ?

10% of 40 at a glance

10% of 404
10% as a fraction1/10
40 + 10%44
40 − 10%36

10% of other numbers

QuestionAnswer
10% of 101
10% of 151.5
10% of 202
10% of 252.5
10% of 303
10% of 404
10% of 505
10% of 606
10% of 707
10% of 757.5
10% of 808
10% of 909
10% of 10010
10% of 12012
10% of 15015
10% of 20020
10% of 25025
10% of 30030
10% of 50050
10% of 1000100

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 10% of 40?

10% of 40 is 4: change 10% to a decimal (0.1) and multiply by 40.

What is 40 plus 10%?

40 increased by 10% is 44 (40 + 4).

What is 40 minus 10%?

40 decreased by 10% is 36 (40 − 4).

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