# What is 20% of 150? — Percentage Calculator

> Calculate 20% of 150 instantly — the answer is 30. Plus percentage change, percentage difference, and add or subtract a percent, with step-by-step formulas.

- **Answer:** 30
- **Category:** Math
- **Interactive calculator:** https://youcalc.com/en/math/percentage/20-percent-of-150/
- **Price:** Free, no sign-up required
- **Full calculator:** [Percentage Calculator](https://youcalc.com/en/math/percentage/)
- **Pre-filled inputs:** `of=20%2C150`

| Metric | Value |
| --- | --- |
| Percentage | 20% |
| Of | 150 |
| Result | 30 |


## Overview

20% of 150 is 30. Because 20% is one-fifth, the fastest route is 150 ÷ 5 = 30. As a decimal it is 0.20 × 150 = 30. Enter any percentage and number below, or switch cards to find percentage change or difference.

## Method

Each mode uses a direct formula. "What is X% of Y" computes (X / 100) × Y. "X is what % of Y" computes (X / Y) × 100, requiring Y ≠ 0. "X is P% of what" solves for the base as X / (P / 100), requiring P ≠ 0. Percentage change is ((new − old) / |old|) × 100, signed, requiring the old value ≠ 0. Percentage difference is |A − B| / ((|A| + |B|) / 2) × 100, order-independent, requiring the two values not both be zero. "Add / subtract a percent" gives base × (1 + p / 100) and base × (1 − p / 100). All formulas follow standard mathematical definitions as documented on MathIsFun.

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## Sources

- https://www.mathsisfun.com/percentage.html
- https://www.mathsisfun.com/numbers/percentage-change.html
- https://www.mathsisfun.com/percentage-difference.html

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Interactive version: https://youcalc.com/en/math/percentage/20-percent-of-150/ · From YouCalc — https://youcalc.com