what number's 20% its 120% more than 12 ?
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A is 20% more than B, then A equals B plus 20% of B.
Translating the last half of the above sentence into an equation, we have:
A = B + (20% x B)
A = B + .20B since 20% = .20.
A = (1 + .20)B since we can factor out a B from each term on the right side.
A = (1.20)B
A = (1.20)(120) since B = 120.
A = 144
CHECK:
The percent increase from B to A = [(A - B)/B] x 100%
= [(144 - 120)/120] x 100%
= [24/120] x 100%
= 1/5 x 100%
= .20 x 100%
= 20%
Therefore, 144 is indeed the correct value for A.
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