Answer:
20% decrease
Step-by-step explanation:
First, let's find the net decrease: Peter started at 80kg and his weight is now 64kg, which is a 16kg decrease. Next, we need to find what percentage of 80kg 16kg represents. First, let's find what part of 80 is 16:
16/80 = 1/5
To convert this to a percent, we need to find an equivalent fraction to 1/5 with a denominator of 100. To do this, we can multiply the numerator and denominator of 1/5 by 20, giving us 20/100, or 20%.
Answer:
y=1.5x=4
Step-by-step explanation:
Answer:
5b i think
Step-by-step explanation:
1.25 and .625
they keep dividing by 2 in the terms.
Suppose the chef mixes x mL of vinegar with y mL of the dressing with 5% vinegar. She wants to end up with a 150 mL mixture, so
x + y = 150
Each mL of pure vinegar contributes - no surprise here - 1 mL of vinegar to the new mixture. Each mL of the 5% vinegar dressing contributes 0.05 mL of vinegar. She wants a dressing with 24% vinegar, meaning 24% of the 150 mL solution should be vinegar, or 36 mL, so
x + 0.05y = 36
Now
x + y = 150 ==> y = 150 - x
x + 0.05(150 - x) = 36 ==> x + 7.5 - 0.05x = 36 ==> 0.95x = 28.5 ==> x = 30
which gives
y = 150 - x ==> y = 120
