Divide 21 / 40 on a calculator. Then add the result to 8.If you have a scientific calculator (one that correctly does multiplications and divisions before it does additions and subtractions), you can type directly:
8 + 12 / 40
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Expressed as a decimal, 21/50 is equal to 0.42.
Expressed as a decimal, 21/100 is equal to 0.21.
7/21:= 7 ÷ 21= 0.333 in decimal
2.625
Expressed as a decimal, 16/21 is equal to 0.761904 recurring (that is, 0.761904761904...)