Answer :
a. Ratio of 60 :80 = 0.75
% decrease = 25%
b . Ratio of 32: 36 = 0.89
% decrease = 11.11%
c. Ratio of 100.8 : 63 = 1.6
% increase = 60%
What is percentage increase and decrease?
The degree to which a value increases expressed in percent form is known as percentage increase. Alternatively, percentage decrease is the percentage degree to which the measure of an item decreases.
% increase = increment/ original value × 100
a. two terms 80, 60
the ratio of second to first term = 60/80 = 0.75
percentage decrease = 80-60/80 ×100 = 20/80 ×100 = 25%
b. 36 , 32
the ratio of the second to first = 32/36 = 0.89
% decrease = 36-32/36 ×100 = 4/36 × 100 = 100/9 = 11.11%
c. 63 , 100.8
the ratio of second to first term = 100.8/63 = 1.6
% increase = 100.8-63/63 × 100 = 37.8/63 × 100 = 60%
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