Final answer:
To convert 21/25 into decimal form without doing actual division, you can use long division.
Step-by-step explanation:
To write 21/25 in decimal form without doing actual division, you can convert the fraction into a decimal by dividing the numerator (21) by the denominator (25) using long division.
Start by placing the decimal point in the quotient above the division line and divide 21 by 25. Since 21 is less than 25, you need to add a decimal and a zero next to it, making it 210.
The first digit of the quotient is 0, so write 0 above the division line. Multiply the remainder (21) by 10, giving 210, and bring down the next digit of the dividend (0). Divide 210 by 25 and you'll get a quotient of 8.4.
Learn more about Converting fractions to decimals