17 IS 4 PERCENT OF WHAT NUMBER

You have learned the to discover 1% the a number method finding 1/100 that it. Similarly, detect 60% that a number way finding 60/100 (or 6/10) that it.In this expressions, words “of” translates into multiplication:1% that 90 → 1% × 90&

We can likewise write those percentages as decimals:1% of 90 → 0.01 × 90

60% that $700 → 0.6 × $700.

This offers us another means to calculation the percentage of a number (or percent of some quantity):

Following the shortcut, we create this as 0.7 × 80.

Remember that in decimal multiplication, girlfriend multiply together if there to be no decimal points, and the answer will have as countless “decimal digits” come the ideal of the decimal allude as the total number of decimal number of every one of the factors. So once you multiply 0.7 × 80, think of multiply 7 × 80 = 560. Due to the fact that 0.7 has one decimal digit, and 80 has actually none, the answer has one decimal digit: 56.0 Thus, 0.7 × 80 = 56.

You can also use “common sense” to reason it v logically: 0.7 × 80 should be less than 80, yet more than 1/2 of 80, which is 40. Because 7 × 8 = 56, you know that the answer have to be 56—not 5.6 or 560.

First write it together 0.03 × $4,000. Climate multiply 3 × $4,000 = $12,000. Finally put the decimal suggest where it provides the answer two decimal digits: $120.00.

Write the expression together 0.23×5,500km and also use a calculator to calculation the product. The price is 1,265km. This answer renders sense since 10% the 5,500km is 550km, therefore 20% is 1,100km. Therefore 1,265km as 23% the 5,500km is a reasonable answer.