Convert the given decimal fractions to per cents. \( \begin{array}{llll}\text { a) } 0.65 & \text { (b) } 2.1 & \text { (c) } 0.02 & \text { (d) } 12.35\end{array} \)

To convert decimal fractions to percentages, multiply each decimal by 100 and add the percent symbol (%). \[ \begin{aligned} \text{a) } 0.65 &= 0.65 \times 100\% = 65\% \\ \text{b) } 2.1 &= 2.1 \times 100\% = 210\% \\ \text{c) } 0.02 &= 0.02 \times 100\% = 2\% \\ \text{d) } 12.35 &= 12.35 \times 100\% = 1235\% \end{aligned} \] **Summary:** \[ \begin{array}{ll} \text{a) } & 65\% \\ \text{b) } & 210\% \\ \text{c) } & 2\% \\ \text{d) } & 1235\% \end{array} \]