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

Monica scored 86% on her final exam. If each question was worth 4 points and there were 400 possible points on the exam, how many questions did Monica answer correctly?

77 | |

86 | |

89 | |

93 |