Well, let's say the numbers are "a" and "b"

so a * b = ab

ok... now, if we reduce "a" by 25%, that means the new size is just 75% of the old one, how much is 75% of a? well, (75/100) * a, or 0.75a

now let's reduce "b" by 50%, that means the new size is 50% or half, how much is 50% of b? well (50/100)*b, or 0.5b

$\bf \begin{cases}
a\cdot b\implies ab\\
0.75a\cdot 0.5b\\
\qquad 0.75\cdot 0.5ab\\
\qquad 0.375ab
\end{cases}$

now, the new size of "ab" is just 0.375ab... well, let's revert the decimal format by simply multiplying by 100

0.375 * 100, is 37.5%

the new size of "ab" is just 37.5% of the original "ab"

it decreased by 100 - 37.5 or 62.5%

5 0

4 years ago

There are 35 more musicians in the String section of a city Symphony Orchestra than in its Brass section. There are 29 musicians

Delicious77 [7]

35 - 29 = 6. 6+29+35 = 70
70 in the string and brass sections of the Symphony Orchestra.

5 0

3 years ago