Which of the following expressions has a sum of 42/100

Step-by-step explanation:

Verify each expression

case 1) we have

Multiply the first term by 10/10

Remember that

Fractions with the same denominator, you can add the numerators and write the sum over the common denominator

so

therefore

case 2) we have

Multiply the second term by 10/10

Remember that

Fractions with the same denominator, you can add the numerators and write the sum over the common denominator

so

therefore

case 3) we have

Multiply the second term by 10/10

Remember that

Fractions with the same denominator, you can add the numerators and write the sum over the common denominator

so

therefore

case 4) we have

Multiply the first term by 10/10

Remember that

Fractions with the same denominator, you can add the numerators and write the sum over the common denominator

so

so

This expression is the answer

answer: no, but if it does it's a obvious pattern.

step-by-step explanation:

sinn is the total amount of students now and m were the students before, you subtract them both (n-m) and divide that by m. then, since to get a percentage from a fraction you have to multiply by 100, your answer should look like this: n-m/m*100

step-by-step explanation: