With any fraction, no matter what its denominator (bottom part), you multiply the numerators (tops) by each other and the denominators (bottoms) by each other.
For example,
Answer:

Step-by-step explanation:

Double negative = Positive:

Apply negative exponent formula:

Multiply:

Apply exponent rule: 
Thus, 
Simplify:

A toy cost 0.85p in January.
Step-by-step explanation:
Given,
Mark down in January = 15%
Let,
Price in December = p
Mark down in January = 15% of price in December
Mark down in January = 
Mark down in January = 0.15p
Price of toy in January = Price in December - Mark down
Price of toy in January = p - 0.15p = 0.85p
A toy cost 0.85p in January.
Keywords: mark down, subtraction
Learn more about subtraction at:
#LearnwithBrainly
Answer:
watt is the standard unit of power in metric units