MOSTMATHSkill 04 · 6.NS.B.3, 6.RP.A.3c, 7.RP.A.3

Decimals and percents

A decimal is a fraction with a power of ten underneath. A percent is a fraction with 100 underneath. Moving between them is moving the decimal point, and "of" means multiply.

Example · Evaluate.

0.3×90.3 \times 9
Steps
  1. Multiply as if there were no decimal points.3×9=27\displaystyle 3 \times 9 = 27
  2. Count the decimal places in the factors: 1 + 0 = 1. Put that many in the answer.=2.7\displaystyle = 2.7

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