umx (version 4.20.0)

fin_percent: Compute the percent change needed to return to the original value after percent off (or on).

Description

Determine the percent change needed to "undo" an initial percent change. Has a plot function as well. If an amount of $100 has 20% added, what percent do we need to drop it by to return to the original value?

fin_percent(20) yields $100 increased by 20% = $120 (Percent to reverse = -17%)

Usage

fin_percent(
  percent,
  value = 100,
  symbol = "$",
  digits = 2,
  plot = TRUE,
  logY = TRUE
)

Value

• new value and change required to return to baseline.

Arguments

percent

Change in percent (enter 10 for 10%, not 0.1)

value

Principal

symbol

value units (default = "$")

digits

Rounding of results (default 2 places)

plot

Whether to plot the result (default TRUE)

logY

Whether to plot y axis as log (TRUE)

See Also

• fin_interest()

Other Miscellaneous Functions: deg2rad(), fin_JustifiedPE(), fin_NI(), fin_interest(), fin_ticker(), fin_valuation(), rad2deg(), umxBrownie()

Examples

# Percent needed to return to original value after 10% taken off
fin_percent(-10)

# Percent needed to return to original value after 10% added on
fin_percent(10)

# Percent needed to return to original value after 50% off 34.50
fin_percent(-50, value = 34.5)