The inverse operation of subtraction is A . Addition
We need a problem or a question
The variation equation is qr = 25
<h3>How to determine the equation?</h3>
An inverse variation is represented as:
qr = k
Where k is the constant of variation
When q = 10 and r =2.5, we have:
k = 10 * 2.5
Evaluate
k = 25
Substitute k = 25 in qr = k
qr = 25
Hence, the equation is qr = 25
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80% mean 80/100=8/10=4/5
4/5 of 40=4/5 times 40/1=160/5=32
answer is 32 quetsions
easier way
10% times 8=80%
10% of 40=4
4 times 8=32
