Percent increase from an original value

ATI TEAS
Math: Numbers and Algebra
Numeric answer
Difficulty 3 of 5

Question

Before a family's guests arrived, the household used 150 gallons of water per day. During the visit, it used 171 gallons per day. What was the percent increase in daily water use?

14 %

Typed answer in %, rounded to a whole number.

Answer

14 %

Rationale

Daily water use before the visit, 150 gallons, is the starting value. The increase is divided by 150, not by the later amount of 171, and the result is multiplied by 100 to give the percent increase.

Worked solution: Percent change = (new − old) ÷ old × 100 = (171 − 150) ÷ 150 × 100 = 14%.

RememberPercent increase = (later amount − earlier amount) ÷ earlier amount × 100.

Sources

DOE-HDBK-1014/1-92 U.S. Department of Energy · License: US government work (public domain) · Retrieved November 2, 2026 · Page 78
Lesson 3: Measures of Risk (Source: CDC) Centers for Disease Control and Prevention (CDC) · License: CDC content (credit required) · Retrieved November 2, 2026 · Vaccine efficacy or vaccine effectiveness
State Operations Manual Centers for Medicare & Medicaid Services · License: US government work (public domain) · Retrieved November 2, 2026 · Page 401
Obesity (MedlinePlus health topic) MedlinePlus, National Library of Medicine · License: US government work (public domain) · Retrieved November 2, 2026 · Summary: Obesity

Last verified: November 5, 2026 2 independent automated checks Question teas-mna-00017, version 1

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