Percentages are ratios of an amount compared to 100. The percent change of an old to new value is equal to 100% x \({ new - old \over old }\).

A circular logo is enlarged to fit the lid of a jar. The new diameter is 60% larger than the original. By what percentage has the area of the logo increased?

25% | |

37\(\frac{1}{2}\)% | |

32\(\frac{1}{2}\)% | |

30% |