diff --git a/PRGM/PRCNTDIF.8xp b/PRGM/PRCNTDIF.8xp
new file mode 100644
index 0000000000000000000000000000000000000000..5476a6d9c412686a9c98fdf7afb2eccf21ad62e0
GIT binary patch
literal 106
zcmdPW3h}fscGHsLV(?8ZD#<9$Pb*Of$<I#BQ}A?gWxx&$8F(2K7+3>>oc%&vJlz-=
p6d2?f?mB8a*$X%pItexl2sjov2{s!EvN+q{+hk~9;4CP}4FD<n6dnKo

literal 0
HcmV?d00001

diff --git a/PRGM/PRCNTDIF.txt b/PRGM/PRCNTDIF.txt
new file mode 100644
index 0000000..8a3ee1a
--- /dev/null
+++ b/PRGM/PRCNTDIF.txt
@@ -0,0 +1,3 @@
+Prompt A,B
+(A-B)/((A+B)/2)→C
+Disp abs(100C)
\ No newline at end of file
diff --git a/PRGM/PRCNTERR.8xp b/PRGM/PRCNTERR.8xp
new file mode 100644
index 0000000000000000000000000000000000000000..0245d9d682d55fee74d7112be33f9a6ef9ca1ae8
GIT binary patch
literal 98
zcmdPW3h}fscGHsLV(?8ZD#<9$Pb*Of$<I#BQ}A?gWxx(J8F(2a7+3>>oc%&vgMt_s
hBpAdP?uKYP+6#mfItn(2usGY_+hk~9;4C<o69AW;6D$A#

literal 0
HcmV?d00001

diff --git a/PRGM/PRCNTERR.txt b/PRGM/PRCNTERR.txt
new file mode 100644
index 0000000..fe58646
--- /dev/null
+++ b/PRGM/PRCNTERR.txt
@@ -0,0 +1,3 @@
+Prompt T,A
+(T-A)/T→C
+Disp abs(100C)
\ No newline at end of file